Apollo's "agentic bank run": checking pays 0.07% while T-bills pay 4.24%, and bank stocks are down 5.7% in September

Torsten Slok, chief economist at Apollo Global Management, asked in a note on Sunday whether AI assistants could set off an "agentic bank run." His argument: tools like Meta's Muse "could soon sweep household cash automatically into accounts paying 3.3% to 5.0%, instead of the 0.1% national average on checking accounts," and if every household did it, he wrote, banks "could lose a large share of the cheap deposits they rely on to make loans."

The note landed on a bad month for bank shares. The Invesco KBW Bank ETF fell 2.3% last week, its third straight weekly decline, and is down 5.7% in September, on pace for its worst month since March 2025, CNBC reported. Goldman Sachs and Bank of America are each down more than 8% this month. CNBC put most of that on rising Treasury yields rather than AI, and noted there is no sign of a run.

The gap, from the primary data

Slok's 0.1% is rounded. The FDIC's latest national deposit rates, published Sept. 21, show:

That is a gap of about 4.2 percentage points between an average interest checking account and a three-month Treasury bill, based on the Treasury's daily yield curve. That gap is the banks' cheapest funding, and it is exactly what an AI agent would be built to close.

What that gap is worth to a business

Take a contractor or a restaurant group that keeps $100,000 in its operating account to cover payroll and suppliers. At 0.07%, that balance earns about $70 a year. At the 4.24% three-month bill rate, the same money would earn about $4,240 before tax (our calculation). Treasury bills are not bank deposits and carry no FDIC insurance, so the comparison is about yield, not about safety.

Moving idle business cash into sweep accounts or Treasury funds is not new; treasurers at larger firms have done it for decades. What Slok is describing is speed and scale: if software makes that move automatically for millions of households and small firms at once, deposits could leave faster than banks have planned for.

Who it would hit

The borrower is the less obvious victim. Cheap deposits are what let a bank offer a revolving credit line to a landscaper or an equipment loan to a trucking company. If those deposits reprice toward Treasury rates, a bank's cost of funds rises, and the usual response is higher loan pricing or tighter approval. Owners with floating-rate lines already feel the other half of this story: the 2-year Treasury yield was near 4.92% on Monday morning, CNBC reported, as markets priced in the chance of further Fed hikes.

None of this is happening yet. Slok frames it as a question, and CNBC noted there are no signs of a run. What is worth watching is the Fed's weekly H.8 data on bank deposits and the next round of bank earnings, where deposit costs and deposit outflows will show up first. More on the rate backdrop: the 30-year Treasury above 5.5% and what October hike odds mean for a payroll line.

Sources: Apollo Global Management; CNBC; FDIC; U.S. Treasury. Interest-income examples are our calculations. This is market information, not investment advice.