Warren Buffett has swallowed nearly 5% of the entire United States Treasury bill market, locking up $300.87 billion in ...

You can sell it anytime, but you must hold bonds purchased directly from the Treasury in your account for 45 days. The related terms "note" and "bill" are reserved to describe shorter-term bonds.

Every month, the Treasury Department publishes delayed data on U.S. assets sold and bought by foreign central banks and ...