The Social Security trust funds, managed by the Department of the Treasury, are the Old-Age and Survivors Insurance (OASI) and Disability Insurance (DI) Trust Funds. Since the beginning of the Social Security program, all securities held by the trust funds have been issued by the Federal Government.

There are two general types of such securities:

  1. special issues—securities available only to the trust funds; and
  2. public issues—securities available to the public (marketable securities).
The trust funds now hold only special issues, but they have held public issues in the past.

Monthly reports from the Bureau of the Fiscal Service provide data on the amount held at the end of the month by type of security, interest rate, and maturity date. The two forms below allow you to access such data. Data are available for 1990 and later.

Detailed report for a month
lists invested amounts by type of security,
interest rate, maturity years, & trust fund
Select     (any year after 1989)
If you select a month for which data are not available, data for the closest available month will be provided.
Time series report
lists invested amounts by type of security
Select fund