The S&P/TSX Income Trust Index is a modular component of the S&P/TSX Composite Index. The index contains all of the income trust constituents from its parent index, the S&P/TSX Composite Index. This index is not capped. The S&P/TSX Income Trust Index in turn, is parent index to the S&P/TSX Capped Energy Trust Index and the S&P/TSX Capped REIT Index. To be a constituent of any of these indices an income trust must be a constituent of the S&P/TSX Composite Index.