The document discusses various money market instruments in India including treasury bills, repurchase agreements, commercial papers, certificates of deposits, call money market, and collateralized borrowing and lending obligations. Money market refers to markets for short-term debt instruments with maturities of one year or less. It includes various submarkets like the inter-bank market and allows players like banks, corporations, and governments to borrow and lend in the short-term. Common characteristics of money market instruments are their short maturities of one year or less, low credit risk, high liquidity, and large transaction volumes.