Not so long ago, a bank was by definition a business that took deposits from customers, paid them for the use of their money, and lent the cash to other customers at a profit. But that’s not how it works anymore:

Big banks to big American companies: We don’t want your cash

(MarketWatch) – State Street Corp., the Boston bank that manages assets for institutional investors, for the first time has begun charging some customers for large dollar deposits, people familiar with the matter said. J.P. Morgan Chase & Co., the nation’s largest bank by assets, has cut unwanted deposits by more than $150 billion this year, in part by charging fees.

The developments underscore a deepening conflict over cash. Many businesses have large sums on hand and opportunities to profitably invest it appear scarce. But banks don’t want certain kinds of cash either, judging it costly to keep, and some are imposing fees after jawboning customers to move it.

The banks’ actions are driven by profit-crunching low interest rates and regulations adopted since the financial crisis to gird banks against funding disruptions.

The latest fees center on large sums deemed risky by regulators, sometimes dubbed hot-money deposits thought likely to flee during times of crises. Finalized last September and overseen by the Federal Reserve and other regulators, the rule involving the liquidity coverage ratio forces banks to hold high-quality liquid assets, such as central bank reserves and government debt, to cover projected deposit losses over 30 days. Banks must hold reserves of as much as 40% against certain corporate deposits and as much as 100% against some deposits from hedge funds.

“At some point you wonder whether there will be a shortage of financial institutions willing to take on these balances,” said Kelli Moll, head of Akin Gump Strauss Hauer & Feld LLP’s hedge-fund practice in New York, saying that where to hold cash has become an increasing topic of conversation as hedge funds are shown the door by long-time banking counterparties.