Why Could AI Assistants Drain Banks' Cheap Deposits?

Banks fund much of their lending with checking accounts that pay almost nothing: the U.S. national average on interest checking is 0.07% a year. The money sits there out of convenience and inertia. An AI assistant that automatically sweeps idle cash to wherever the yield is higher removes that inertia. On September 28, 2026, Apollo chief economist Torsten Slok warned this could set off a "slow-motion run" on cheap deposits.

What exactly did Torsten Slok say?#

According to CoinDesk, Slok described a scenario in which AI assistants automatically move household cash from low-yield checking accounts into higher-yield alternatives. If every household did this, banks could lose a large share of the cheap deposits they rely on to make loans. He called it a slow-motion bank run — not a one-day panic, but a steady outflow that is hard to stop.

The same report cites the rate gap: about 0.1% on checking versus 3.3–5% a year on savings products from fintechs and online banks.

Why does cash still sit in accounts that pay almost nothing?#

The gap shows up in FDIC data as of September 21, 2026 — national averages across U.S. insured institutions:

• interest checking — 0.07%;
• savings — 0.37%;
• money market deposit account — 0.63%;
• 12-month CD — 1.73%.

For comparison, the 10-year Treasury yielded about 5.25% on September 29, per Trading Economics. On $10,000, the difference between 0.07% and 3.3% is roughly $7 versus $330 a year. People don't move money because it takes time, attention and decisions about timing. An agent given rules and account access can do it every day without a human in the loop.

Where do crypto and stablecoins come in?#

Automated transfers between services need fast, cheap payment rails, and the industry is pitching stablecoins for that job. CoinDesk cites the x402 protocol for AI-agent payments: roughly 188–205 million cumulative transactions and about 69,000 active agents.

But don't confuse the rail with the destination. In the U.S., the GENIUS Act bars stablecoin issuers from paying interest to holders, so a stablecoin by itself is not a substitute for a savings account. It is more of a conveyor between an account and a yield-bearing product such as a tokenized Treasury fund. We explained the difference in our piece on the stablecoin interest ban.

What could this mean for banks and customers?#

If outflows become noticeable, banks have two options: pay more on checking or replace cheap deposits with pricier funding. Either way, loans get more expensive. For customers the scenario looks attractive — idle cash earns something. But the gain comes with a different set of risks, listed below.

What are the limits and risks of this scenario?#

• A hypothesis, not data. There is no mass migration of agent-managed cash yet; Slok is describing a possible future.
• Different protection. A U.S. bank deposit is insured by the FDIC up to $250,000 per depositor, per bank. Money market funds, tokenized funds and stablecoins are not bank deposits and carry no such insurance.
• Agent errors. A misread rule or a broken integration can move money to the wrong place or at the wrong time — say, right before a large bill.
• Access and permissions. To move money, an agent needs account access. The broader the permissions, the worse a hack or mistake becomes.
• Liquidity. Higher-yield products don't always allow instant withdrawals; some have settlement delays or redemption limits.
• Rates change. The 3–5 percentage-point gap exists at today's rates; if rates fall, the incentive to move money weakens.