In this paper, we derive a model of the individual banking firm facing stochastic inflation. The bank is considered as a depository financial intermediary operating in the primary market as a multiproduct price discriminating firm. A secondary market is also considered where liquidity surpluses and deficits are traded. Two types of assets and liabilities are assumed: deposits and loans linked to a general price level and nonlinked instruments. Effects of changes in the parameters such as inflation rate and variability, reserve requirements are analyzed.