The S&P U.S. Mortgage-Backed Securities Index is a rules-based, market-value-weighted index covering U.S. dollar-denominated, fixed-rate and adjustable-rate/hybrid mortgage pass-through securities issued by Ginnie Mae (GNMA), Fannie Mae (FNMA) and Freddie Mac (FHLMC).
Top 10 Constituents by Index WeightExport
*Based on GICS sectors
The weightings for each sector of the index are rounded to the nearest tenth of a percent, therefore, the aggregate weights for the index may not equal to 100%.
*Based on GICS Sectors