This series has been discontinued and will no longer be updated. It was a duplicate of the following series, which will continue to be updated: https://fred.stlouisfed.org/series/WSHOMCB
The current face value of mortgage-backed obligations held by Federal Reserve Banks. These securities are guaranteed by Fannie Mae, Freddie Mac, or Ginnie Mae.
Board of Governors of the Federal Reserve System (US), Mortgage-backed securities held by the Federal Reserve: All Maturities (DISCONTINUED) [MBST], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/MBST, August 18, 2018.