AI Agents Could Drain Banks' Cheap Deposits
Apollo chief economist Torsten Slok warned that AI agents could drain cheap bank deposits. The warning was reported on September 28, 2026. It points to a funding risk for banks. CoinDesk
Slok warned the agents could automatically move household cash from low-interest checking accounts to higher-yield alternatives. Yield here means interest earned. CoinDesk You set the rules. The agent watches and sweeps. Friction disappears.
Yahoo Finance reported on September 26, 2026 that AI advances could make idle cash less idle, squeezing a margin banks earn from cheap funding. Yahoo Finance That margin is the deposit franchise spread, the profit from paying little on everyday balances.
An earlier signal came from the United Kingdom. Reuters reported on December 16, 2025 that the agentic AI race by British banks raises new risks for the regulator. Reuters Reuters also reported that AI agents could revolutionise how people budget, save and invest. Reuters
Rate sensitivity is already clear. The Federal Reserve's Beige Book dated March 3, 2021 reported that deposit growth was tempered as financial institutions reduced rates on interest-bearing accounts. Federal Reserve
The broader context here is the deposit franchise as habit. Banks fund with checking deposits that have low beta, meaning they barely respond to market rates, and long life, meaning they stay put. Stickiness comes from search costs, switching costs and inattention, not contracts. An agent that scans for yield and moves money gives that edge to savers. Inertia was the subsidy. Code removes it.
Looking at what this means for funding and liquidity, the shift is speed and sensitivity. Internal pricing, rate hedging and cash buffers assume steady retail deposits. If sweeps turn automatic and correlated, outflows react faster to rates. The replacement is timed deposits and wholesale funding, which track markets more closely and leave faster. Net interest margin, the gap between what banks earn and pay, shrinks from the cost side. Backup liquidity plans must assume joint moves.
In my view, who builds the agent will matter as much as the outflow math. Bank agents will aim to keep money inside the bank. Outside agents will chase the best yield for the client. The clash hits disclosure, sweep order, overdraft handling and error fixes. Supervisors will focus on model checks, responsibility for machine orders and whether sweep homes fit savers. The UK flag suggests conduct risk comes early. Funding shifts. Trust rules follow.
What to watch from here is repricing. Rate committees face constant pressure on deposits, not occasional campaigns. Pricing power fades without deep relationships. Sorting by who stays gets harder. Hedges shorten. Deposit strategy becomes less about branches and more about a place in the agent stack.
