Level is zero beginning in 2004:Q1. Prior to 2004:Q1, level from Freddie Mac, table on Trading Securites, Non-mortgage-related securities, Debt securities issued by the U.S. Treasury and other U.S. government corporations and agencies, column Fair value. Unadjusted transactions are the change in the level; data for the latest ten years show no significant seasonality.
Last edited on: 11/23/2009