In finance, call money is any minimum short-term loan repayable on demand, with a maturity period of one to fourteen days or overnight to a fortnight.
Call money is a method by which banks lend to each other to be able to maintain the cash reserve ratio.
There is an inverse relationship between call rates and other short-term money market instruments such as certificates of deposit and commercial paper.
In the international market, the term usually refers to the short-term financing by banking institutions to brokers for maintaining the margin account.
It is different from the term "loan" as the schedule for the payment of interest and principal is not fixed.