This series covers one slice of the Fed's QE asset purchases, spanning bonds with 10 to 22.5 years left. The publisher is the New York Fed, acting only on directives for SOMA, the Fed securities portfolio, from the FOMC, the policy committee.
The sector was created May 13, 2021, effective May 14, 2021, as part of a program running March 2020 to early March 2022. It covers outright purchases, meaning permanent buys held to maturity, of nominal coupons, meaning fixed-rate bonds, bought in the secondary market, meaning resale trading. Trading is with primary dealers, which bid for themselves and their customers, and excludes on-the-run bonds, the newest bonds, not total holdings or issuance.