The Department of the Treasury manages the trust funds
and provides the Social Security Administration
with monthly data on financial operations of the trust funds and on
investment data. Social Security has two trust funds: the
Old-Age and Survivors Insurance
(OASI) Trust Fund and the
Disability Insurance (DI) Trust Fund.
Income & cost data
An explanation of the components
of income and cost may help you better understand the data.
The trust funds are invested in Federal government securities.