money market

system in which there are transactions with liquid assets for short periods of time

In finance, the money market is the global financial market for short-term borrowing and lending. It provides short-term liquid funding for the global financial system. The money market is where short-term obligations such as Treasury bills, commercial paper and bankers' acceptances are bought and sold.
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Noun
1. a market for short-term debt instruments
(hypernym) market, securities industry

Money markets are for borrowing and lending money for three years or less. The securities in a money market can be U.S.government bonds, Treasury bills and commercial paper from banks and companies.