Call Money Market
The Call Money Market is the segment of India's money market where banks and primary dealers borrow and lend unsecured funds for very short periods — overnight (call money) or up to 14 days (notice money) — to manage daily reserve requirements and short-term liquidity.
The Call Money Market functions as the circulatory system of India's banking sector. Banks that end the day with excess CRR balances lend to banks that are short of their required reserves, with settlement occurring the same day or the next. This overnight or short-term unsecured lending happens at rates that fluctuate with system-wide liquidity — rising when money is tight (deficit liquidity) and falling when funds are ample (surplus liquidity). The weighted average call rate (WACR) is the headline indicator for this segment and is published daily by the RBI.
The RBI's LAF corridor effectively bounds the call rate. Banks can always borrow from the RBI at the marginal standing facility (MSF) rate (100 basis points above the repo rate) rather than pay above that in the call market, creating a ceiling. Similarly, banks can always park surplus funds with the RBI at the SDF rate (25 basis points below the repo rate) rather than lend below that rate, creating a floor. The WACR thus fluctuates within this corridor, and the RBI's liquidity management operations aim to keep it close to the repo rate.
Participants in the call money market in India are restricted to scheduled commercial banks (including co-operative banks) and primary dealers. Non-bank entities — mutual funds, insurance companies, corporates — are excluded from the pure call money segment and instead access similar short-term unsecured funding through the commercial paper market or collateralised repo markets. This restriction was introduced to protect the integrity of the market and prevent excessive credit risk concentration.
The call rate is a leading indicator of monetary conditions. A persistent tendency for the WACR to trade above the repo rate signals that the banking system is in liquidity deficit, meaning banks collectively need to borrow from the RBI to meet reserve requirements. A WACR pinned near the SDF rate indicates a surplus system where banks are parking excess funds with the RBI rather than lending to peers or the real economy. Analysts track the difference between WACR and repo rate — called the spread or the LAF balance — as a gauge of how tight or easy monetary conditions truly are, beyond the headline policy rate.
For fixed-income and money-market fund investors, the call rate environment influences the yields available on liquid and overnight funds. In tight liquidity conditions, these funds can briefly generate returns above the repo rate, while in surplus conditions they may lag. Corporate treasurers managing working capital also find the call rate relevant as a benchmark against which to assess the opportunity cost of holding idle cash.