Read Part I before reading this article.
Basically it implies that the bank gets to use your money for 51 days free of cost. Therefore, the banks have the option of leveraging these zero-cost funds and lend them at higher rates of interest. This is one of the most important sources of their profits.
At the same time a sharp cookie will deposit Rs 100,000 on April 10th instead of April 11th and remove the money on May 1st. The minimum between April 10th and April 30th now is Rs 100,000 and hence he gets 3.5 per cent a year for just keeping the money for 20 days. Continue reading