What does a bank do to its excess reserves?

A bank typically holds excess reserves as a buffer to meet unexpected withdrawals or regulatory requirements. It can also lend out these excess reserves to generate interest income, typically through loans to customers or interbank lending. Alternatively, a bank may invest the excess reserves in short-term securities to earn a return while maintaining liquidity. Ultimately, the management of excess reserves is a key aspect of a bank's liquidity and profitability strategy.