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U.S. Municipal Rating Transitions And Defaults, 1986-2009

Publication Date:    Mar 11, 2009 15:45 Europe/London

U.S. Municipal Rating Transitions And Defaults, 1986-2009
Primary Credit Analysts:
James Wiemken, Chicago (1) 312-233-7005;
james_wiemken@standardandpoors.com
William Montrone, New York (1) 212-438-2062;
bill_montrone@standardandpoors.com
Secondary Credit Analyst:
Adam Watson, Chicago (1) 312-233-7044;
adam_watson@standardandpoors.com
Publication date: 11-Mar-09, 11:45:22 EST
Reprinted from RatingsDirect


Standard & Poor's Ratings Services has updated its data on the performance and default rates of U.S. public finance (USPF) ratings through year-end 2008. The data suggests to us the following:

  • Cumulative average default rates continue to maintain a rank ordering commensurate with the rating category;
  • USPF ratings tend to be more stable at higher rating levels; and
  • Overall, the USPF sector remains significantly stable in nature and of sound credit quality, although defaults have occurred across all sectors.

As a general proposition, for the years relevant to our study, unenhanced debt (i.e., debt obligations not supported by financial guarantees, structuring techniques, multiple-party features, or other external credit support) rated by Standard & Poor's has shown significant credit stability throughout a broad range of events, including a changed economic environment, federal government mandates, tax reform measures, and any number of influences on general credit. The study tracked the behavior of unenhanced rated debt obligations from Jan. 1, 1986 to Jan. 1, 2009; aggregate and sector data are also included in this study. The public finance-wide conclusions and the aggregated tables focus on unenhanced debt and exclude public finance structured and housing debt, as debt obligations issued in those sectors typically include some form of enhancement or have ratings that are dependent on multiple obligors. In the sector breakdowns, housing information is shown on an issue basis rather than an issuer basis; methodologically, therefore, we have not included this information with the other public finance data. Credit types included in the study are:

  • General obligation,
  • Lease/appropriation/moral obligation,
  • Special tax (sales, gas, etc.),
  • Special district,
  • Water and sewer revenue,
  • Public power,
  • Airports,
  • Ports,
  • Toll roads and bridges,
  • Parking,
  • Various types of bond pools,
  • Transit,
  • Public and private higher education,
  • Auxiliary higher education debt,
  • Independent schools,
  • Hospitals (stand-alone and systems),
  • Continuing care, and
  • Physicians' practices.

2008 Performance

Defaults during 2008 of USPF credits rated by Standard & Poor's equaled the high set in 1992. In addition, one housing issue defaulted (see charts 1 and 2). These defaults were the result of a variety of factors, including budget imbalances and failed attempts at restructurings. Defaults included two tax-secured credits, one sewer utility, two hospitals, and one housing issue. The following defaults of standard & Poor's-rated debt occurred in 2008:

  • Presidio County, Texas' series 2002 certificates of obligation defaulted following budgetary imbalances and management turnover.
  • Jefferson County, Ala.'s series 2003 B-2 through 2003 B-7 sewer revenue refunding warrants were deemed defaulted following the sewer system's failure to make a principal payment on the bank warrants when due on April 1, 2008, in accordance with the terms of the standby warrant purchase agreement. Although the county and the relevant banks entered into a forbearance agreement that effectively delayed payment under the standby warrant purchase agreements, Standard & Poor's rates an issue 'D' when payments on an obligation are not made on the date due in accordance with the terms of the documents.
  • Jefferson County, Ala.'s series 2001B general obligation warrants were deemed in default following the county's failure to make a principal payment on the bank warrants when due on Sept. 15, 2008, in accordance with the terms of the standby warrant purchase agreement. As above, the county and the banks entered into a forbearance agreement which effectively delayed payment under the standby warrant purchase agreement.
  • New Jersey Health Care Facilities Financing Authority's series 2003 and 1998 bonds, issued for Pascack Valley Hospital, defaulted following the hospital's closure and bankruptcy filing in 2007.
  • Pontiac Hospital Finance Authority, Mich.'s series 1993 bonds issued for North Oakland Medical Center (NOMC) defaulted following increasing losses and the hospital's failure to restructure the hospital's relationship with the city of Pontiac or find a joint operating partner.
  • Texas State Affordable Housing Corporation's multi-family mortgage revenue bonds series 2002C defaulted after market softness and rising expenses left the South Texas Affordable Properties Corporation, the borrower, with insufficient coverage and reserves to meet debt service.

 Chart 1
image

 Chart 2
image

As we see it, rating transitions during 2008 were dominated by two countervailing forces. The first was a series of rating criteria changes that led on balance to a significant number of upgrades in the government sectors (tax secured, appropriations, and utilities). The second force, working in the other direction, was the softening economy (see tables 1 and 2). While overall there were more upgrades than downgrades in all public finance sectors except health care and housing, by the fourth quarter the upward trend had ceased in all sectors except government and transportation (for more information on factors driving 2008 credit performance, see "U.S. Public Finance Sustained Upgrade Trend In Fourth Quarter But Felt Recession’s Bite," published Jan. 28, 2009 on RatingsDirect).

When comparing the ratings distribution at the end of 2008 to that at the start of the default study period, we see that the numerical dominance of government sector ratings and the effect of multiple years of criteria changes have driven most of the difference (see table 3). From Jan. 1, 1986 to Jan. 1, 2009, 'AAA' and 'AA' rated credits increased to 38% from 20% of all USPF ratings. As chart 3 shows, the health care, higher education, and housing sectors were the only sectors to see increases in the share of speculative grade ratings during this period (note that ratings volume may be driven both by credit conditions and the demand for ratings). In all cases, speculative grade ratings continue to represent a small minority of USPF ratings.

 Chart 3
image


Transition Rates

The study's transition analysis, which measures the stability of rating classes over the time period, shows that, generally speaking, public finance ratings were highly stable during the period, particularly at the uppermost end of the scale (see tables 4 through 8). At the 'AAA' level, for example, about 98% of ratings during the relevant years remained at 'AAA' one year later as shown in table 4. At 'BBB' or lower, however, ratings were about 88% likely to remain at the same level a year later. The diagonal that begins at the top left in the 'AAA' category and descends to the lower right is a useful reference illustrating this historical rating transition behavior. Numbers on the diagonal represent unchanged ratings, while those to its left and right represent rating upgrades and downgrades, respectively. The entries on this diagonal show that during the period studied, higher rating categories experienced higher rating stability, without exception. Generally, for ratings 'A' or lower, the numbers to the left of the diagonal are greater than those to the right (excluding ratings that have been withdrawn, which are designated as NR), showing a trend of more upgrades than downgrades over the years. The same general trend is borne out by examining rating transitions by modifier, although we believe the sample size renders any conclusions tentative, particularly at the speculative grade levels (see tables 5 and 6). Across sectors, ratings and credit volatility increased at the lower end of the scale during the years studied, particularly in the historically more volatile sectors, housing and health care (see table 7). In health care, in particular, downgrades outnumbered upgrades across the entire rating scale. In housing, issues below investment grade similarly had more downgrades than upgrades. During the relevant years, the general governmental sectors of tax-secured and utilities, along with higher education, were the most stable of all sectors. The number of credits in those universes was also the largest over the period, so the overall statistics were significantly driven by general governmental performance.


Default Analysis

Standard & Poor's-rated USPF default counts over the course of the study vary from no defaults in six of the years covered to a high of five defaults in 1992 and 2008 (see table 9). Of the 39 total defaults in the study, 37 were non-investment grade immediately before the default as demonstrated in chart 5. On an issue basis, housing defaults total 60 and have ranged from zero to a high of 21 on an annual basis (see table 10). Of the 21 defaults occurring in 1991, it should be noted that 19 were related to the failure of Executive Life Insurance Co. as an investment agreement provider. A list of each USPF default and each housing default is provided in tables 11 and 12, respectively.

Although the number of defaults over these years has been, relatively speaking, low, we do believe securities issued by municipalities can still bear meaningful default risk. For one thing, over the years in question the municipal market has tended to be self-selecting -- municipal issuers of lower credit quality have tended not to request ratings. Correspondingly, the universe of rated municipalities was, as a general proposition, more creditworthy and, of course, less likely to default. When the entirety of the public finance issuers and issues is evaluated, as opposed to simply the rated universe, however, more defaults appear. Data received from Standard & Poor's Securities Evaluations show nearly 1,300 issue defaults during the same period. In our opinion, this comparison suggests a level of credit risk attendant to the universe of municipal finance that is greater than one might discern from a default study of Standard & Poor's-rated municipals alone.

 Chart 4
image

 Chart 5
image


Default Rates

Chart 6 and tables 13 and 14 show that, generally speaking, cumulative average default rates have occurred at relative levels commensurate with the rating category. Default rates increased over time, particularly for lower-rated credits. Tables 15 and 16 show a less-precise relationship when one examines default rates by rating modifier. This is not surprising as the limited number of defaults and the limited number of credits in some rating levels allows average default rates to be more affected by a single event. Examining default rates broken down by rating category and by year further demonstrates the danger of reading too much into the average default rates. (tables 17 through 22). Because no USPF defaults have occurred at the 'AAA' level, default rates are shown only for the 'AA' category and below. For the housing data, default rates are shown across all rating categories. What we consider significant default volatility is evident as one examines smaller portions of the data set. At many rating levels, the standard deviation of the default rates raises questions about the value of the average statistic for assessing trends.

 Chart 6
image


Relative Rating Performance

In addition to examining the absolute performance of USPF ratings, Standard & Poor's 2009 study examines their relative performance. One technique we use to measure relative performance is the Gini coefficient. The Gini coefficient is a summary statistic of the Lorenz curve. The Lorenz curve was developed by Max O. Lorenz as a graphical representation of the proportionality of a distribution. We use it with ratings as one indication of the appropriateness of the rating distribution's rank ordering. The Lorenz curve is derived by plotting out the cumulative proportion of issuers by rating category with the cumulative proportion of defaulters by rating category. To determine relative performance of the Lorenz curve, we compare it with an ideal curve and a random curve. In the ideal curve, all issuers in the lowest rating category ('CCC'/'CC', in this case) default, and all defaults are in the lowest rating category. In the random curve, all defaults occur randomly throughout the rating distribution, so it lies along the diagonal of the chart. The Gini coefficient is a ratio of two areas: the area bounded by the Lorenz curve and the random curve divided by the area bounded by the ideal curve and random curve. The result is a relative performance measure that is between 1 and 0, 1 being a Gini coefficient with perfect rank ordering (all defaults in the lowest rating category and all issuers in the lowest rating category default) and 0 being a random rank ordering. We believe that Lorenz curves and Gini coefficients can provide useful information when compared with other Lorenz curves' Gini coefficients.

Charts 7 through 10 depict Lorenz curves for USPF rating performance at the one-, three-, five-, and seven-year timeframes, while charts 11 through 14 depict Lorenz curves for housing performance at the same time periods. For both USPF and housing specifically, the Lorenz curves move further away from the ideal curve as the time period lengthens. In all cases, however, the Lorenz curve remains closer to the ideal curve than the random curve. The Gini coefficients in table 23 tell the same story, with the Gini remaining above 0.5 in all cases.

 Chart 7
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 Chart 8
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 Chart 9
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 Chart 10
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 Chart 11
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 Chart 12
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 Chart 13
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 Chart 14
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Methodology And Definitions

A Standard & Poor's rating primarily assesses the ability and willingness of an obligor to meet its financial commitments. Accordingly, a default is recorded upon the first occurrence of monetary payment default on the relevant obligation. Technical defaults, such as covenant violations, are not by themselves payment defaults. We generally lower issue ratings to 'D' following a payment default on the corresponding obligation. We include bonds that would have defaulted if not for bond insurance if those bonds bore a SPUR, as is the case for the Jefferson County, Ala. issues.

Our default study is based on a performance analysis of the unenhanced debt obligations (i.e., obligations not relying on external support provided by guaranties, outside support, or alternative revenue streams) of public finance issuers and includes bonds issued by a range of entities. We used long-term parity debt ratings throughout the study. These ratings reflect Standard & Poor's opinion of an obligor's overall capacity to pay its obligations (i.e., its fundamental creditworthiness). As such, our analysis focuses on the issuer's payment capacity and willingness to meet its financial commitment on an obligation according to its terms.

The data tracked the ratings of 5,085 parity debt obligations outstanding as of Jan. 1, 1986, increasing to 12,970 parity debt obligations outstanding as of Jan. 1, 2009. The data include general obligation, appropriation-backed, special tax, revenue, and higher education and health care bonds. Although the rating of an appropriation-backed bond is usually linked to that of the obligor since, in certain cases, the ratings of appropriation-backed bonds can move independently of those of the obligor, we have included those ratings. One of the study's goals was to show the rating transitions and default history of the traditional public finance market: cities, towns, school districts, and hospitals, as well as the bonds issued by those entities. We excluded from the study bonds wrapped by a monoline insurer , unless the bonds bear an underlying, unenhanced rating by Standard & Poor's (a SPUR), in which case we included the SPUR.. The study is based on individual issuances, rather than on dollar amounts, to avoid the risks of magnitude skewing results.

On a sector basis, we believe results are useful but must be evaluated with the size of the respective sectors in mind:

  • Tax-secured credits increased to 7,700 through 2008 from 2,314 in 1985;
  • Appropriation credits increased to 3,148 from 468 over the same period;
  • Utilities increased to 1,352 from 820 over the same period;
  • Transportation credits totaled 284 in 1985 and declined to 253 in 2008;
  • Higher education increased to 800 in 2008 from 363 in 1985;
  • Health care declined to 764 in 2008 from 848 in 1985; and
  • On an issue basis, and not an issuer basis, housing increased to 9,570 in 2008 from 4,329 in 1985.

Static pool methodology

The years covered by the study saw relatively few issuances default in their early years. Accordingly, default rates over a given period that are obtained by dividing the number of defaults by the number of issuances then outstanding will be distorted if the number of issuances increases over the period. To avoid this potentially misleading statistic, Standard & Poor's conducts its default studies on the basis of groupings called "static pools." A static pool is formed on the first day of each year covered by the study and followed from that point on. All ratings included in the study are sorted into these pools. The pools are static in the sense that the denominator (entity ratings included in the pool) remains constant over time. This fact, however, must be understood in the context of a single study. Because errors, if any, will generally be corrected by new updates and because the criteria for inclusion or exclusion of ratings in the study may be subject to minor revisions in future studies, it is not possible to compare pools across studies. However, every new update revises results back to the same starting date (Jan. 1, 1986) to avoid continuity problems.

All ratings are followed year to year within each pool. This annual tracking involves the comparison of each parity rating on the first and last day of each calendar year. Multiple rating changes in any single year are not reflected -- only beginning- and end-of-year ratings are reflected. This occasionally results in what could be considered dramatic transitions. The NRs (obligations no longer rated by Standard & Poor's) in the study include issuances that have become monoline insured, as well as issuances that have been refunded, matured, or withdrawn.

For example, the 1986 static pool comprises all parity debt outstanding as of Jan. 1, 1986. The 1987 static pool was formed by adding new parity ratings first rated in 1986 to the still-outstanding ratings of the 1986 static pool and subtracting those ratings that defaulted or were set to NR. This same method was used to form static pools for 1988-2008. As an example, if a parity debt rating of 'BB' is assigned in mid-1986 and is lowered to 'B' in 1988 and followed by a default ('D') in 1993, this hypothetical rating would be included in the 1987 and 1988 pools as a 'BB', and in the 1989-1993 pools as a 'B'. All pools that include this obligation would capture its 1993 default.


Default rates

We calculated annual default rates for each static pool: first in units and later as percentages with respect to the number of issuers in each rating category. We then combined these percentages to obtain cumulative default rates for the 23 years covered by the study.

We estimated cumulative default rates that average the experience of all static pools. This was accomplished by calculating marginal default rates, conditional on survival (survivors being nondefaulters) for each possible time horizon and for each static pool; weight averaging the conditional marginal default rates; and accumulating the average conditional marginal default rates. Conditional default rates are calculated by dividing the number of issuers in a static pool that default at a specific time horizon by the number of issuers that survived (did not default) to that point in time. Weights are based on the number of issuers in each static pool. Cumulative default rates are one minus the product of the proportion of survivors (nondefaulters).

For instance, the weighted average first-year default rate for entities rated in the 'B' category for all 23 pools was 1.46%, meaning that an average of 98.54% made payments in accordance with their terms for the first year. Similarly, the second- and third-year conditional marginal averages were 1.57% for the first 22 pools (98.43% of those issuers that did not default in the first year did not default in the second year) and 0.86% for the first 21 pools (99.15% of those entities that did not default by the second year did not default in the third year either), respectively. Multiplying 98.54% by 98.43% results in a 96.99% non-default rate to the end of the second year, or a two-year cumulative average default rate of 3.01%. Multiplying 96.99% by 99.15% results in a 96.16% non-default rate to the end of the third year, or a three-year 3.84% cumulative average default rate.


Transition analysis

To compute one-year rating transition ratios by rating category, we compared each entity's rating at the beginning of a particular year with its rating at end of the same year. Multiple rating changes within one year are not reflected. We counted a parity obligation rated for more than one year as many times as the number of years it was rated. For instance, an issuer continually rated during 1986-1992 would appear in six consecutive one-year transition matrices. All 1986 static pool members still rated on Dec. 31, 2008 had 23 one-year transitions, while parity ratings first assigned in 2007 had only one.

Each one-year transition matrix displays all rating movements between letter categories from the beginning of the year to year-end. For each rating listed in the matrix's left-most column, there are nine ratios listed in the columns, corresponding to ratings from 'AAA' to 'D', plus an entry for NR. For instance, according to the average one-year transition rates for USPF (see table 4), which average all one-year transitions:

  • 89.52% of debt rated in the 'A' category at the beginning of a given year remained in the same category at year end;
  • 2.52%, on average, were upgraded to the 'AA' cateogry;
  • 0.85% were on average lowered to the 'BBB' category; and
  • 0.03% were downgraded to the 'BB' category, and so on.

Further transition information for each of the USPF and housing static pools is presented in tables 25 and 26.

Tony Santiago provided valuable assistance by compiling the data for this study.

Table 1
2008 Transition Rates By Category (%)
From/To AAA AA A BBB BB B CCC/C D NR
   USPF
AAA 99.46 0.00 0.27 0.00 0.00 0.00 0.00 0.00 0.27
AA 2.80 93.94 0.27 0.00 0.00 0.05 0.00 0.03 2.91
A 0.03 9.07 88.87 0.45 0.00 0.03 0.00 0.02 1.52
BBB 0.00 0.31 14.66 82.36 0.62 0.10 0.00 0.05 1.90
BB 0.00 0.00 0.00 4.42 88.50 1.77 0.88 0.00 4.42
B 0.00 0.00 3.85 0.00 3.85 84.62 3.85 3.85 0.00
CCC/C 0.00 0.00 12.50 12.50 0.00 0.00 50.00 12.50 12.50
   Utility
AAA 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 9.02 87.16 0.00 0.00 0.00 0.00 0.00 0.00 3.83
A 0.15 21.20 76.84 0.15 0.00 0.00 0.00 0.15 1.50
BBB 0.00 0.63 31.25 66.25 0.00 0.00 0.00 0.00 1.88
BB 0.00 0.00 0.00 66.67 33.33 0.00 0.00 0.00 0.00
B 0.00 0.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 100.00 0.00 0.00
   Higher Education
AAA 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.97 98.06 0.00 0.00 0.00 0.00 0.00 0.00 0.97
A 0.00 2.26 94.35 1.13 0.00 0.00 0.00 0.00 2.26
BBB 0.00 0.00 1.48 95.56 0.00 0.00 0.00 0.00 2.96
BB 0.00 0.00 0.00 0.00 93.75 0.00 0.00 0.00 6.25
B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
   Tax Secured
AAA 99.23 0.00 0.38 0.00 0.00 0.00 0.00 0.00 0.38
AA 4.08 94.99 0.19 0.00 0.00 0.06 0.00 0.06 0.62
A 0.00 9.26 89.75 0.23 0.00 0.07 0.00 0.00 0.69
BBB 0.00 0.29 18.40 80.27 0.00 0.19 0.00 0.10 0.76
BB 0.00 0.00 0.00 14.29 85.71 0.00 0.00 0.00 0.00
B 0.00 0.00 12.50 0.00 0.00 87.50 0.00 0.00 0.00
CCC/C 0.00 0.00 33.33 33.33 0.00 0.00 33.33 0.00 0.00
   Health Care
AAA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.00 95.19 3.85 0.00 0.00 0.00 0.00 0.00 0.96
A 0.00 0.00 94.67 4.33 0.00 0.00 0.00 0.00 1.00
BBB 0.00 0.37 1.83 90.48 4.40 0.00 0.00 0.00 2.93
BB 0.00 0.00 0.00 0.00 88.89 4.44 2.22 0.00 4.44
B 0.00 0.00 0.00 0.00 11.11 66.67 11.11 11.11 0.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 33.33 33.33 33.33
   Transportation
AAA 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.00 94.55 3.64 0.00 0.00 0.00 0.00 0.00 1.82
A 0.00 3.33 95.83 0.00 0.00 0.00 0.00 0.00 0.83
BBB 0.00 0.00 0.00 100.00 0.00 0.00 0.00 0.00 0.00
BB 0.00 0.00 0.00 20.00 80.00 0.00 0.00 0.00 0.00
B 0.00 0.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 100.00 0.00 0.00
   Appropriation
AAA 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.22 93.78 0.07 0.00 0.00 0.07 0.00 0.00 5.86
A 0.08 6.85 89.54 0.08 0.00 0.00 0.00 0.00 3.46
BBB 0.00 0.37 12.92 81.55 0.00 0.00 0.00 0.00 5.17
BB 0.00 0.00 0.00 0.00 93.33 0.00 0.00 0.00 6.67
B 0.00 0.00 0.00 0.00 0.00 100.00 0.00 0.00 0.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
   Housing Issues
AAA 96.16 0.89 0.05 0.05 0.00 0.00 0.00 0.00 2.86
AA 0.17 98.28 0.89 0.14 0.00 0.00 0.00 0.00 0.53
A 0.08 0.24 98.72 0.08 0.40 0.00 0.00 0.00 0.48
BBB 0.00 0.00 0.72 98.19 0.00 0.36 0.36 0.00 0.36
BB 0.00 0.00 3.13 3.13 81.25 3.13 3.13 0.00 6.25
B 0.00 0.00 0.00 0.00 0.00 90.48 4.76 0.00 4.76
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 78.57 7.14 14.29

Table 2
2008 Upgrades and Downgrades
Ratings Upgrades Downgrades
Total USPF* 11907 2043 118
Utility 1247 448 2
Tax Secured 5975 1144 24
Higher Education 741 38 5
Health Care 734 23 79
Transportation 240 15 4
Appropriation 2970 375 4
Housing issues 9591 45 101
* Does not include housing

Table 3
U.S. Public Finance Rating Distributions* (%)
Rating Category 1986 2009
AAA 1 4
AA 19 34
A 59 47
BBB 19 14
Speculative Grade 1 1
* excludes housing issues

Table 4
USPF Average Obligor Transition Rates, 1986-2008 (%)
Rating AAA AA A BBB BB B CCC/C D NR
   1 Year
AAA 97.61 1.14 0.10 0.00 0.00 0.00 0.03 0.00 1.11
AA 0.78 92.69 1.21 0.03 0.00 0.00 0.00 0.00 5.29
A 0.02 2.52 89.52 0.85 0.03 0.02 0.01 0.00 7.03
BBB 0.00 0.06 3.57 87.85 0.65 0.12 0.06 0.01 7.67
BB 0.00 0.07 0.27 7.94 78.68 3.12 0.68 0.20 9.03
B 0.00 0.00 0.73 2.67 7.77 70.39 4.85 1.46 12.14
CCC/C 0.00 0.00 0.60 0.60 1.80 8.38 64.07 13.77 10.78
   3 Year
AAA 93.56 2.78 0.23 0.00 0.00 0.00 0.05 0.00 3.38
AA 2.02 79.45 2.61 0.26 0.00 0.00 0.00 0.00 15.66
A 0.06 5.63 70.92 2.00 0.08 0.05 0.02 0.01 21.22
BBB 0.00 0.67 7.21 66.78 1.47 0.34 0.13 0.08 23.30
BB 0.00 0.24 1.35 16.28 48.29 5.24 1.11 0.95 26.53
B 0.00 0.28 1.39 10.56 8.61 35.56 4.72 3.89 35.00
CCC/C 0.00 0.00 0.00 0.65 10.32 3.87 36.13 23.87 25.16
   5 Year
AAA 91.14 3.99 0.30 0.00 0.00 0.00 0.00 0.00 4.58
AA 3.02 67.70 3.47 0.20 0.00 0.01 0.00 0.00 25.59
A 0.10 7.38 54.50 2.62 0.14 0.06 0.03 0.03 35.13
BBB 0.00 0.99 8.95 48.77 1.78 0.50 0.15 0.17 38.68
BB 0.00 0.37 2.31 18.45 29.06 4.43 1.20 1.29 42.90
B 0.00 0.32 1.95 10.06 4.55 17.53 3.25 5.52 56.82
CCC/C 0.00 0.00 0.00 10.96 1.37 5.48 22.60 30.14 29.45
   7 Year
AAA 89.66 5.09 0.48 0.00 0.00 0.00 0.00 0.00 4.77
AA 4.06 57.27 3.58 0.21 0.00 0.01 0.00 0.00 34.86
A 0.13 8.37 39.93 2.58 0.16 0.07 0.04 0.04 48.70
BBB 0.00 1.26 8.89 34.06 1.66 0.52 0.12 0.25 53.23
BB 0.00 0.43 2.98 16.83 16.29 3.19 1.28 1.38 57.61
B 0.00 0.38 1.51 6.42 2.64 8.68 1.51 7.92 70.94
CCC/C 0.00 0.00 0.00 11.11 0.00 5.19 15.56 31.11 37.04
   10 Year
AAA 87.82 6.35 0.38 0.00 0.00 0.00 0.00 0.00 5.46
AA 5.39 44.41 2.89 0.16 0.00 0.02 0.00 0.00 47.12
A 0.17 7.97 23.81 1.97 0.18 0.06 0.05 0.06 65.74
BBB 0.00 1.55 7.10 17.83 0.97 0.36 0.13 0.32 71.73
BB 0.00 0.25 4.18 10.00 5.82 1.77 1.27 1.27 75.44
B 0.00 0.00 3.03 2.16 1.30 2.16 0.43 8.23 82.68
CCC/C 0.00 0.00 0.00 9.26 0.00 1.85 8.33 35.19 45.37
   15 Year
AAA 81.94 10.19 0.93 0.23 0.00 0.00 0.00 0.00 6.71
AA 7.16 33.11 2.55 0.17 0.00 0.02 0.00 0.01 56.98
A 0.30 7.83 12.47 1.03 0.15 0.08 0.06 0.11 77.96
BBB 0.00 1.17 5.90 6.97 0.44 0.15 0.05 0.44 84.88
BB 0.00 0.58 3.08 4.24 1.16 0.58 0.00 1.93 88.44
B 0.00 0.00 0.00 1.31 0.00 0.00 0.00 11.11 87.58
CCC/C 0.00 0.00 0.00 3.95 0.00 0.00 0.00 39.47 56.58

Table 5A
Average One-Year Obligor Transition Rates By Modifier, 1986-2008 (%)
Rating AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB-
AAA 97.61 0.97 0.17 0.00 0.00 0.07 0.03 0.00 0.00 0.00 0.00 0.00 0.00
AA+ 4.53 88.51 2.22 0.35 0.05 0.00 0.00 0.00 0.17 0.00 0.00 0.00 0.00
AA 0.35 3.19 88.71 1.66 0.31 0.10 0.03 0.00 0.01 0.00 0.00 0.00 0.00
AA- 0.11 0.48 5.61 86.07 1.73 0.72 0.04 0.00 0.01 0.00 0.00 0.00 0.00
A+ 0.05 0.08 0.92 5.20 85.71 1.59 0.38 0.03 0.03 0.03 0.00 0.01 0.00
A 0.00 0.02 0.22 0.74 3.88 85.13 1.27 0.50 0.13 0.13 0.01 0.02 0.01
A- 0.00 0.02 0.07 0.66 1.15 5.72 83.56 1.15 0.54 0.25 0.00 0.04 0.01
BBB+ 0.00 0.01 0.01 0.06 0.31 1.23 4.88 83.28 1.86 0.43 0.06 0.10 0.02
BBB 0.00 0.01 0.01 0.03 0.13 0.53 0.95 3.62 84.91 1.37 0.23 0.21 0.06
BBB- 0.00 0.02 0.00 0.02 0.00 0.04 1.59 0.74 4.36 82.95 1.30 0.90 0.16
BB+ 0.00 0.00 0.19 0.00 0.00 0.00 0.37 0.37 2.23 6.15 73.37 4.10 2.23
BB 0.00 0.00 0.00 0.00 0.00 0.13 0.13 0.39 2.73 5.71 2.86 72.99 1.95
BB- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.60 0.60 3.01 4.82 71.69
B+ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.20 0.00 1.20 1.20
B 0.00 0.00 0.00 0.00 0.41 0.41 0.00 0.83 2.49 0.83 0.83 8.71 2.07
B- 0.00 0.00 0.00 0.00 0.00 1.14 0.00 0.00 0.00 0.00 0.00 1.14 1.14
CCC 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.07 0.00
CCC- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
CC 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
C 0.00 0.00 0.00 0.00 20.00 0.00 0.00 0.00 0.00 20.00 0.00 0.00 0.00

Table 5B
Average One-Year Obligor Transition Rates By Modifier, 1986-2008 (%)
Rating B+ B B- CCC CCC- CC C D NR
AAA 0.00 0.00 0.00 0.03 0.00 0.00 0.00 0.00 1.11
AA+ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.18
AA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.63
AA- 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 5.23
A+ 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 5.96
A 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.01 7.92
A- 0.00 0.03 0.00 0.01 0.00 0.00 0.00 0.00 6.79
BBB+ 0.00 0.04 0.02 0.05 0.00 0.00 0.00 0.00 7.64
BBB 0.03 0.05 0.02 0.02 0.00 0.01 0.01 0.01 7.81
BBB- 0.02 0.27 0.09 0.14 0.02 0.00 0.00 0.04 7.35
BB+ 1.12 0.74 0.56 0.19 0.00 0.00 0.00 0.37 8.01
BB 0.91 1.56 0.39 0.78 0.00 0.00 0.13 0.00 9.35
BB- 1.20 4.22 1.20 1.20 0.00 0.00 0.00 0.60 10.84
B+ 63.86 4.82 4.82 3.61 0.00 0.00 1.20 1.20 16.87
B 2.90 61.00 2.49 3.73 0.41 0.00 0.41 2.07 10.37
B- 0.00 3.41 75.00 5.68 0.00 0.00 0.00 0.00 12.50
CCC 1.38 4.83 0.69 64.14 0.69 2.07 0.00 12.41 11.72
CCC- 0.00 0.00 0.00 0.00 40.00 0.00 0.00 40.00 20.00
CC 33.33 0.00 0.00 16.67 0.00 25.00 0.00 25.00 0.00
C 0.00 0.00 0.00 0.00 0.00 0.00 60.00 0.00 0.00

Table 6A
Housing Average One-Year Issue Transition Rates By Modifier, 1986-2008 (%)
Rating AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB-
AAA 93.96 0.19 0.35 0.07 0.02 0.13 0.02 0.00 0.01 0.00 0.00 0.04 0.00
AA+ 1.99 91.94 1.39 0.89 0.05 0.10 0.07 0.00 0.01 0.00 0.00 0.00 0.00
AA 1.40 2.90 88.19 0.82 0.34 0.34 0.28 0.02 0.05 0.09 0.00 0.00 0.00
AA- 0.39 0.20 4.27 86.24 0.71 2.15 0.24 0.05 0.05 0.10 0.01 0.02 0.00
A+ 0.63 1.45 2.83 1.89 87.33 0.30 0.22 0.14 0.01 0.11 0.03 0.02 0.00
A 1.51 0.04 0.54 0.63 2.47 84.11 0.68 0.14 0.57 0.93 0.08 0.36 0.00
A- 0.41 0.00 0.11 0.19 0.78 2.59 80.42 0.41 3.77 0.81 0.07 0.67 0.00
BBB+ 0.20 0.00 0.00 0.00 0.30 2.27 4.04 81.08 1.18 0.49 0.49 0.99 0.00
BBB 0.38 0.00 0.15 0.08 1.15 1.91 0.69 2.91 76.11 1.68 0.38 4.52 0.54
BBB- 0.38 0.00 0.38 0.00 0.48 1.44 1.06 1.34 3.45 79.85 0.48 1.06 0.58
BB+ 0.00 0.00 0.00 0.00 1.02 1.02 0.00 1.02 1.02 1.02 70.41 5.10 1.02
BB 0.23 0.00 0.00 0.00 0.46 0.69 1.37 0.92 2.29 3.89 0.23 59.95 0.23
BB- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.76 0.00 0.00 0.00 59.52
B+ 12.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
B 1.56 0.00 0.52 0.00 0.00 0.52 0.52 0.00 0.00 0.00 0.00 3.65 0.52
B- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
CCC+ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
CCC 3.11 0.00 0.00 0.00 0.00 1.24 0.00 0.00 0.62 0.00 0.00 1.24 0.00
CCC- 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
CC 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.70 0.00 2.70 0.00 0.00
C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Table 6B
Housing Average One-Year Issue Transition Rates By Modifier, 1986-2008 (%)
Rating B+ B B- CCC+ CCC CCC- CC C D NR
AAA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.21
AA+ 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 3.55
AA 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 5.55
AA- 0.00 0.01 0.00 0.00 0.02 0.00 0.00 0.00 0.01 5.51
A+ 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 5.02
A 0.01 0.11 0.00 0.00 0.02 0.00 0.01 0.00 0.00 7.77
A- 0.00 0.07 0.07 0.00 0.04 0.00 0.04 0.00 0.07 9.47
BBB+ 0.00 0.39 0.00 0.00 0.00 0.00 0.00 0.00 0.00 8.57
BBB 0.00 0.77 0.00 0.00 0.23 0.08 0.15 0.00 0.08 8.19
BBB- 0.00 0.19 0.00 0.00 0.86 0.00 0.10 0.00 0.10 8.25
BB+ 1.02 3.06 0.00 0.00 4.08 0.00 3.06 0.00 0.00 7.14
BB 0.46 9.84 0.23 0.00 2.29 0.00 1.14 0.23 4.81 10.76
BB- 0.00 9.52 2.38 0.00 7.14 0.00 0.00 0.00 2.38 14.29
B+ 62.50 12.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 12.50
B 0.00 66.15 1.04 0.00 10.94 0.00 1.04 1.04 2.60 9.90
B- 0.00 0.00 37.50 0.00 25.00 0.00 0.00 0.00 0.00 37.50
CCC+ 0.00 0.00 0.00 75.00 0.00 0.00 25.00 0.00 0.00 0.00
CCC 0.00 0.00 0.00 0.62 63.98 0.62 3.11 1.86 9.94 13.66
CCC- 0.00 0.00 0.00 0.00 0.00 33.33 0.00 33.33 0.00 33.33
CC 0.00 0.00 0.00 0.00 0.00 0.00 51.35 0.00 18.92 24.32
C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 42.86 42.86 14.29

Table 7
Average One-Year Transition Rates by Category, 1986-2008 (%)
Rating AAA AA A BBB BB B CCC/C D NR
   Utility
AAA 96.74 0.72 0.00 0.00 0.00 0.00 0.00 0.00 2.54
AA 1.40 92.91 1.34 0.02 0.00 0.00 0.00 0.00 4.32
A 0.10 2.95 89.41 0.56 0.06 0.02 0.04 0.01 6.86
BBB 0.00 0.02 3.14 87.15 0.46 0.02 0.00 0.02 9.18
BB 0.00 0.00 0.56 11.11 76.67 0.56 1.11 0.00 10.00
B 0.00 0.00 0.00 0.00 3.33 73.33 3.33 0.00 20.00
CCC/C 0.00 0.00 0.00 0.00 0.00 10.53 81.58 7.89 0.00
   Higher Education
AAA 98.17 0.31 0.00 0.00 0.00 0.00 0.00 0.00 1.53
AA 0.65 93.36 1.48 0.09 0.00 0.00 0.00 0.00 4.43
A 0.00 1.44 91.61 1.21 0.02 0.00 0.00 0.00 5.72
BBB 0.00 0.08 2.96 89.89 0.74 0.04 0.04 0.00 6.26
BB 0.00 0.00 0.00 3.95 89.47 0.00 0.00 1.32 5.26
B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 50.00 50.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
   Tax-Secured
AAA 98.13 1.06 0.14 0.00 0.00 0.00 0.00 0.00 0.67
AA 1.05 93.55 0.55 0.01 0.00 0.00 0.00 0.00 4.83
A 0.01 2.15 90.90 0.33 0.01 0.03 0.00 0.00 6.57
BBB 0.00 0.06 3.42 89.65 0.22 0.11 0.03 0.01 6.50
BB 0.00 0.00 0.66 14.24 75.83 0.99 0.66 0.00 7.62
B 0.00 0.00 3.57 5.95 16.67 61.90 2.38 2.38 7.14
CCC/C 0.00 0.00 4.76 4.76 9.52 14.29 52.38 0.00 14.29
   Health Care
AAA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.00 91.00 2.57 0.00 0.00 0.00 0.00 0.00 6.44
A 0.00 0.81 87.12 3.12 0.14 0.05 0.01 0.00 8.75
BBB 0.00 0.05 1.34 88.24 2.36 0.33 0.10 0.02 7.57
BB 0.00 0.14 0.14 3.82 79.46 5.67 0.85 0.28 9.63
B 0.00 0.00 0.00 0.84 4.60 73.22 6.69 1.26 13.39
CCC/C 0.00 0.00 0.00 0.00 1.10 3.30 65.93 16.48 13.19
   Transportation
AAA 100.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.00 91.83 1.11 0.00 0.00 0.00 0.00 0.00 7.06
A 0.00 1.18 88.67 0.78 0.03 0.00 0.00 0.00 9.34
BBB 0.00 0.06 1.53 85.68 0.67 0.18 0.24 0.00 11.63
BB 0.00 0.00 0.00 9.47 74.74 2.11 0.00 0.00 13.68
B 0.00 0.00 0.00 0.00 11.76 76.47 5.88 0.00 5.88
CCC/C 0.00 0.00 0.00 0.00 0.00 16.67 33.33 50.00 0.00
   Appropriation
AAA 92.23 4.15 0.00 0.00 0.00 0.00 0.52 0.00 3.11
AA 0.23 91.14 2.08 0.06 0.00 0.01 0.00 0.00 6.49
A 0.01 4.38 86.93 1.15 0.01 0.00 0.01 0.01 7.51
BBB 0.00 0.09 7.13 83.39 0.16 0.06 0.08 0.00 9.08
BB 0.00 0.00 0.00 13.16 80.70 0.00 0.00 0.00 6.14
B 0.00 0.00 0.00 10.00 10.00 70.00 0.00 0.00 10.00
CCC/C 0.00 0.00 0.00 0.00 0.00 30.00 30.00 20.00 20.00
   Housing
AAA 93.96 0.61 0.17 0.01 0.04 0.00 0.00 0.00 5.21
AA 1.40 92.37 1.11 0.12 0.01 0.00 0.01 0.00 4.97
A 0.93 3.72 87.20 1.28 0.27 0.06 0.03 0.01 6.50
BBB 0.33 0.21 4.37 82.55 3.21 0.48 0.48 0.06 8.33
BB 0.17 0.00 2.25 6.24 63.08 9.53 4.51 3.81 10.40
B 1.92 0.48 0.96 0.00 3.85 66.35 12.98 2.40 11.06
CCC/C 2.36 0.00 0.94 0.94 1.42 0.00 66.51 12.26 15.57

Table 8
Housing Average Issue Transition Rates, 1986-2008 (%)
Rating AAA AA A BBB BB B CCC/C D NR
   1 Year
AAA 93.96 0.61 0.17 0.01 0.04 0.00 0.00 0.00 5.21
AA 1.40 92.37 1.11 0.12 0.01 0.00 0.01 0.00 4.97
A 0.93 3.72 87.20 1.28 0.27 0.06 0.03 0.01 6.50
BBB 0.33 0.21 4.37 82.55 3.21 0.48 0.48 0.06 8.33
BB 0.17 0.00 2.25 6.24 63.08 9.53 4.51 3.81 10.40
B 1.92 0.48 0.96 0.00 3.85 66.35 12.98 2.40 11.06
CCC/C 2.36 0.00 0.94 0.94 1.42 0.00 66.51 12.26 15.57
   3 Year
AAA 81.97 1.35 0.46 0.03 0.04 0.00 0.00 0.06 16.09
AA 4.52 77.34 2.48 0.50 0.05 0.01 0.03 0.02 15.04
A 2.47 10.32 63.75 2.82 0.72 0.19 0.10 0.08 19.53
BBB 0.77 0.46 11.43 52.05 4.63 1.86 1.16 0.70 26.95
BB 0.98 0.39 4.70 10.76 28.38 9.59 8.61 8.02 28.57
B 5.52 1.23 3.07 1.23 4.91 36.20 7.98 8.59 31.29
CCC/C 5.41 0.00 2.16 2.16 2.70 0.00 36.76 18.92 31.89
   5 Year
AAA 71.05 1.62 0.67 0.06 0.02 0.00 0.00 0.12 26.47
AA 7.59 64.45 3.04 0.56 0.07 0.01 0.02 0.02 24.23
A 3.37 14.73 47.57 2.53 0.95 0.41 0.21 0.17 30.06
BBB 1.12 0.30 11.22 37.02 2.20 1.64 1.60 1.53 43.36
BB 2.45 0.67 6.24 9.58 16.93 4.45 5.12 11.14 43.43
B 8.46 1.54 4.62 0.00 3.85 21.54 4.62 9.23 46.15
CCC/C 6.21 0.00 0.00 1.86 3.11 0.00 24.22 18.63 45.96
   7 Year
AAA 61.02 1.69 0.87 0.08 0.02 0.00 0.00 0.15 36.17
AA 9.93 54.71 2.78 0.43 0.02 0.01 0.03 0.03 32.07
A 4.45 18.26 35.03 2.01 0.78 0.38 0.25 0.28 38.57
BBB 1.56 0.36 11.51 26.55 0.96 1.08 1.40 1.89 54.67
BB 3.13 0.52 6.53 7.31 11.75 2.09 2.87 12.01 53.79
B 10.09 0.00 5.50 0.00 0.00 17.43 3.67 7.34 55.96
CCC/C 7.58 0.00 0.00 0.00 3.03 0.00 21.21 18.18 50.00
   10 Year
AAA 44.88 1.41 0.71 0.06 0.02 0.00 0.00 0.21 52.72
AA 12.74 42.06 1.72 0.17 0.01 0.02 0.00 0.05 43.24
A 6.26 20.62 22.40 1.11 0.42 0.30 0.14 0.26 48.49
BBB 1.84 0.28 10.28 17.26 0.37 0.60 0.92 1.42 67.03
BB 3.58 0.30 5.07 5.37 7.46 1.19 1.49 10.75 64.78
B 12.79 0.00 5.81 0.00 0.00 12.79 2.33 6.98 59.30
CCC/C 9.09 0.00 0.00 0.00 0.91 0.00 16.36 19.09 54.55
   15 Year
AAA 25.21 0.93 0.59 0.10 0.02 0.00 0.00 0.42 72.75
AA 14.17 25.25 1.41 0.17 0.00 0.01 0.00 0.06 58.94
A 10.21 20.44 11.64 0.51 0.12 0.06 0.07 0.26 56.69
BBB 1.85 0.00 8.10 8.55 0.32 0.45 0.57 0.32 79.85
BB 4.21 0.00 3.16 4.21 3.16 0.70 2.46 10.53 71.58
B 15.71 0.00 4.29 0.00 0.00 4.29 1.43 8.57 65.71
CCC/C 14.52 0.00 0.00 0.00 0.00 0.00 6.45 19.35 59.68
   20 Year
AAA 12.54 0.56 0.81 0.08 0.00 0.00 0.00 0.73 85.27
AA 13.99 15.54 1.46 0.14 0.00 0.01 0.01 0.12 68.72
A 12.42 16.89 5.99 0.65 0.12 0.05 0.14 0.44 63.29
BBB 2.08 0.00 8.51 2.43 0.17 0.87 0.69 0.69 84.55
BB 0.00 0.00 4.35 8.70 4.35 0.00 2.17 0.00 80.43
B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
CCC/C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00

Table 9
USPF Annual Obligor Default Summary
Defaults
Default Rate (%)
Year Total Investment grade Speculative grade Overall Investment grade Speculative grade
1986 0 0 0 0.00 0.00 0.00
1987 3 1 2 0.06 0.02 2.47
1988 0 0 0 0.00 0.00 0.00
1989 3 0 3 0.06 0.00 3.70
1990 3 0 3 0.05 0.00 4.00
1991 1 0 1 0.02 0.00 1.10
1992 5 0 5 0.08 0.00 5.26
1993 0 0 0 0.00 0.00 0.00
1994* 4 1 3 0.04 0.01 3.41
1995 1 0 1 0.01 0.00 1.19
1996 0 0 0 0.00 0.00 0.00
1997 0 0 0 0.00 0.00 0.00
1998 0 0 0 0.00 0.00 0.00
1999 1 0 1 0.01 0.00 1.28
2000 3 0 3 0.04 0.00 4.48
2001 3 1 2 0.05 0.01 2.94
2002 1 0 1 0.01 0.00 1.33
2003 1 1 0 0.01 0.01 0.00
2004 3 0 3 0.03 0.00 2.63
2005 1 0 1 0.01 0.00 0.95
2006 1 0 1 0.01 0.00 0.76
2007 0 0 0 0.00 0.00 0.00
2008 5 3 2 0.03 0.03 1.36
Mean 1.7 0.3 1.4 0.02 0.00 1.60
Median 1.0 0.0 1.0 0.01 0.00 1.19
Std Dev 1.6 0.7 1.4 0.02 0.01 1.63
Min 0.0 0.0 0.0 0.00 0.00 0.00
Max 5.0 3.0 5.0 0.08 0.03 5.26
* Orange County, Calif. defaulted the year its rating was assigned.

Table 10
Housing Annual Issue Default Summary
Defaults
Default Rate (%)
Year Total Investment grade Speculative grade Overall Investment grade Speculative grade
1986 0 0 0 0.00 0.00 0.00
1987 1 1 0 0.02 0.02 0.00
1988 1 1 0 0.02 0.02 0.00
1989 0 0 0 0.00 0.00 0.00
1990 0 0 0 0.00 0.00 0.00
1991 21 0 21 0.41 0.00 23.08
1992 1 0 1 0.02 0.00 1.05
1993 4 0 4 0.08 0.00 4.82
1994 1 0 1 0.02 0.00 1.14
1995 1 0 1 0.02 0.00 1.19
1996 1 0 1 0.02 0.00 1.35
1997 0 0 0 0.00 0.00 0.00
1998 2 0 2 0.03 0.00 2.86
1999 1 0 1 0.02 0.00 1.28
2000 0 0 0 0.00 0.00 0.00
2001 1 0 1 0.02 0.00 1.47
2002 5 2 3 0.07 0.02 4.00
2003 3 0 3 0.04 0.00 3.53
2004 4 1 3 0.06 0.01 2.63
2005 6 0 6 0.09 0.00 5.71
2006 3 1 2 0.04 0.01 1.53
2007 3 1 2 0.03 0.01 1.53
2008 1 0 1 0.01 0.00 0.68
Mean 2.6 0.3 2.3 0.04 0.00 2.52
Median 1.0 0.0 1.0 0.02 0.00 1.28
Std Dev 4.3 0.5 4.3 0.08 0.01 4.67
Min 0.0 0.0 0.0 0.00 0.00 0.00
Max 21.0 2.0 21.0 0.41 0.02 23.08

Table 11
USPF Defaulted Obligors, 1986-2008
Rating
Obligor State Category Default Date Next to Last First
St. Paul Hsg & Redev Auth MN Utility rev 12/02/2004 CCC A
St. Paul Port Auth MN Utility rev 12/02/2004 CCC A
St. Josephs Hosp of Alton IL Health care rev 05/24/1989 CCC- A
Spokane Downtown Found WA Trans rev 08/09/2001 CCC BBB-
South Fulton Med Center GA Health care rev 04/27/2000 CCC BBB+
Sacred Heart Med Center of Chester PA Health care rev 01/08/1992 CCC A-
Presidio County TX Tax sec 12/11/2008 BBB- BBB-
Pascack Valley Hosp NJ Health care rev 9/30/2008 CC A
Parkview Hosp OH Health care rev 10/13/1994 C A-
Oregon Coast Aquarium OR Higher ed rev 10/07/2002 CCC BBB-
Orange County CA Tax sec 12/08/1994 CCC AA-
Northwest General Hosp MI Health care rev 10/04/1990 C BBB
North Oakland Med Center MI Health care rev 03/31/2008 B BBB
New Magma Irrigation & Drainage Dist AZ Tax sec 06/02/1994 C BBB+
New Jersey Economic Development Auth NJ Trans rev 12/03/1987 CC BBB
Michigan Health Care Corp. MI Health care rev 09/20/1995 CCC BB
Metro Hosp PA Health care rev 12/19/1989 CCC A-
Mercy Hosp and Med Center IL Health care rev 01/05/2004 CCC A
Massachusetts Port Auth MA Trans rev 01/04/2006 CCC- BBB+
Logan General Hosp WV Health care rev 02/03/1999 CCC BBB
Lassen Cmnty College Dist CA Appropriation 04/06/1987 CCC BBB-
Kerr County TX Appropriation 03/14/2005 CC A-
Jefferson County AL Utility rev 03/06/2008 B A+
James C. Guiffre Med Center PA Health care rev 07/02/1992 CCC BBB
Jacksonville General Hosp & Med Center FL Health care rev 04/02/1992 CCC BBB
Jackson Park Hosp Found IL Health care rev 03/04/1992 CCC A
Illinois IL Appropriation 02/04/2003 A A-
Hyde Park Comnty Hosp, Ill. Cent Comnty Hosp IL Health care rev 12/17/1991 CCC BBB
Hialeah Hosp Inc. FL Health care rev 02/10/1992 CCC BBB
Granada Hills Comnty Hosp CA Health care rev 05/14/2001 CCC BBB-
Graduate Health System Obligated Group PA Health care rev 01/04/2000 CCC A
Devils Lake ND Utility rev 09/16/1987 B BBB-
Crouse Health Hosp NY Health care rev 07/03/2001 CCC BBB
Colorado Ute Electric Association CO Utility rev 07/06/1990 CCC A-
Choate-Symmes Health MA Health care rev 01/08/1990 CCC A-
Central Med Center Hosp MO Health care rev 06/07/1989 CCC- BBB-
Central Arizona Irrigation & Drainage Dist AZ Tax sec 12/02/1994 C BBB
Bradford College MA Higher ed rev 11/02/2000 CCC BBB-
Jefferson County AL Tax sec 9/24/2008 B AA-

Table 12
Housing Defaulted Issues, 1986-2008
Rating
Obligor State Issue Series Default Date Next to Last First
Pines of Yellow Creek WY Ser 1983A 12/2/1987 CC AAA
St. Louis Land Clear Redev Auth MO Ser 1984 3/18/1988 AA+ AA+
Adams County CO Ser 1986A 5/2/1991 CC AAA
El Paso Hsg Fin Corp. TX Ser 1986A 5/2/1991 CC AAA
El Paso Hsg Fin Corp. TX Ser 1986A 5/2/1991 CC AAA
Nebraska Investment Fin Auth NE Ser 1986A 5/2/1991 CC AAA
Nebraska Investment Fin Auth NE Ser 1986B 5/2/1991 BB AAA
Midland County Hsg Fin Corp. TX Ser 1982A 6/4/1991 CC A+
Tuscon Indus Dev Auth AZ 6/6/1991 CCC AAA
Simi Valley CA Ser 1989A 8/6/1991 CC AAA
Simi Valley CA Ser 1989A 8/6/1991 CC AAA
Southeast Texas Hsg Fin Corp. TX Ser 1986A 9/3/1991 CC AAA
St. Paul Hsg & Redev Auth MN Ser 1989B 9/3/1991 CCC AAA
St. Paul Hsg & Redev Auth MN Ser 1989B 9/3/1991 CCC AAA
St. Paul Hsg & Redev Auth MN Ser 1989A 9/3/1991 CCC AAA
St. Paul Hsg & Redev Auth MN Ser 1989B 9/3/1991 CCC AAA
Memphis Health Ed & Hsg Fac Board TN Ser 1986A 9/17/1991 CC AAA
Memphis Health Ed & Hsg Fac Board TN Ser 1986A 9/17/1991 CC A
Northern California Home Mort Fin Auth CA Ser 1982A 10/1/1991 CC AA-
Louisiana Agri Fin Auth LA Ser 1986A 10/2/1991 CC AAA
Louisiana Agri Fin Auth LA Ser A 10/2/1991 CC AAA
Louisiana Agri Fin Auth LA Ser A 10/2/1991 CC AAA
Louisiana Agri Fin Auth LA Ser 1986A 10/2/1991 CC AAA
El Paso County CO Ser 1982B 3/16/1992 B A+
Jefferson County CO Ser 1982A 3/2/1993 CCC A+
Aurora CO Ser 1983A 9/2/1993 CCC A
Aurora CO Ser 1983A 9/2/1993 CCC A
Jefferson County CO Ser 1982A 12/31/1993 CCC A+
El Paso County CO Ser 1982A 9/21/1994 CCC AA
Louisiana Hsg Fin Agency LA Ser 1986A 3/30/1995 CC A
Los Angleles Hsg Auth CA Ser 1992A 6/3/1996 CCC A
Windsor Hsg Found MN Ser 1996A 1/28/1998 NR A
Windsor Hsg Found MN Ser 1996B 1/28/1998 NR BBB
Louisville & Jefferson County Metro Govt KY Ser 1995 11/14/1998 CC A-
Radcliff Hsg Auth KY Ser 1995 11/14/1998 CC A-
Boulder County CO Ser 1982A 11/1/1999 CC A
Blackwater Hsg Corp. FL Ser 1995A 9/6/2001 CC BBB
Emerald Coast Hsg Corp. FL Ser 1995A 1/8/2002 CCC BBB
Patten Towers L.P. II Tn Ser 1995A 8/1/2002 CC A-
Patten Towers L.P. II Tn Ser 1995B 8/1/2002 C BBB
Indianapolis IN Ser 1996A 11/11/2002 CCC A
Indianapolis IN Ser 1996C 11/11/2002 CCC- BBB
American Opp Found / Dallas-Fort Worth Afford Hsg Corp. TX Ser 1996D 1/2/2003 CCC BB-
Austin Hsg Fin Corp. TX Ser 1997A 1/8/2003 CCC A
Austin Hsg Fin Corp. TX Ser 1997C 1/8/2003 CC BBB
Mercy Hsg AZ Ser 1997A 8/19/2004 B A
Mercy Hsg AZ Ser 1997B 8/19/2004 CCC BBB
Texas State Afford Hsg Corp. TX Ser 2001B 10/8/2004 CC BBB-
Texas State Afford Hsg Corp. TX Ser 2001C 10/8/2004 C BB
Harris County Hsg Fin Corp. TX Ser 1999C 4/11/2005 CCC BBB
Harris County Hsg Fin Corp. TX Ser 1999D 4/11/2005 CCC BB
Raleigh Hsg Auth NC Ser 1999A 6/10/2005 CC A-
American Opp for Hsg TX Ser 2002B 9/22/2005 C BBB-
American Opp for Hsg TX Ser 2002C 9/22/2005 C BB
De Kalb County Hsg Auth GA Ser 1996C 10/20/2005 C BBB
Shelby County Health Ed & Hsg Fac Board TN Ser 1997A 1/13/2006 CCC A
Liberty Hsg Dev Corp. NY Ser 1996A 3/20/2006 AA- AAA
American Hsg Found TX Ser 2002B 3/28/2006 C BBB-
St. Louis Indus Dev Auth MO Ser 1997 4/3/2007 C BBB+
St. Cloud Hsg & Redev Auth MN Ser 1999A 5/29/2007 B BBB
Little Rock Family Hsg LLC AR Ser 2004B 10/11/2007 BB A-
South Texas Afford Hsg Corp. TX Ser 2002C 9/9/2008 C BB

Table 13
USPF Cumulative Average Obligor Default Rates, 1986-2008 (%)
Rating Y1 Y2 Y3 Y14 Y15 Y16 Y17 Y18 Y19 Y20 Y21 Y22 Y23
AAA 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
AA 0.00 0.00 0.01 0.06 0.07 0.08 0.09 0.10 0.12 0.14 0.18 0.22 0.32
A 0.00 0.01 0.02 0.09 0.11 0.13 0.15 0.16 0.18 0.19 0.20 0.22 0.25
BBB 0.01 0.04 0.08 0.37 0.37 0.37 0.37 0.37 0.37 0.37 0.37 0.37 0.37
BB 0.20 0.57 0.97 2.07 2.07 2.07 2.07 2.07 2.07 2.07 2.07 2.07 2.07
B 1.46 3.01 3.84 7.70 7.70 7.70 7.70 7.70 7.70 7.70 7.70 7.70 7.70
CCC/C 13.77 19.44 23.95 41.76 41.76 41.76 41.76 41.76 41.76 41.76 41.76 41.76 41.76
Investment Grade 0.00 0.01 0.03 0.14 0.16 0.17 0.18 0.19 0.21 0.22 0.23 0.25 0.29
Speculative Grade 1.56 2.61