Banks' Best Business Just Got a New Threat: AI Agents That Move Your Cash

Wall Street has found a new reason to worry about bank profits, and this one isn't about credit losses or rate cuts. It's about AI agents getting better at moving your cash somewhere that pays more.

The trigger was Meta's newly launched Muse, an AI assistant that can connect to a user's financial accounts, track balances and investments, and act on their behalf. Days after its release, Muse had reportedly overtaken ChatGPT as the top download on the iPhone App Store — and Wall Street noticed. The KBW Nasdaq Bank Index fell roughly 2.6% on Tuesday as investors priced in a new kind of threat to bank margins: an AI that might do the "cash sorting" work customers rarely bother doing themselves. Bank stocks have since recovered part of that drop.

Consumer-facing names beyond the big banks also felt it, including Charles Schwab, JPMorgan Chase, Booking Holdings, Expedia, and Arthur J. Gallagher — a sign investors see this as a broader "customer inertia" story, not just a banking one.

Why idle cash is such a big deal for banks

Checking, savings, and brokerage cash sitting at low yields is some of the cheapest funding a bank has. Customers historically haven't moved it, even when better rates are one click away, simply out of habit and friction. That inertia is a real source of bank profitability. An AI agent that removes the friction — scanning for higher-yielding alternatives and shifting money automatically — threatens to erode that advantage directly, by forcing banks to pay more for deposits or watch them walk out the door.

What Wall Street is actually watching

Bank of America analyst Ebrahim Poonawala was quick to frame the risk in a note to clients: Muse's rapid adoption "establishes the opportunity" for margin compression, but proof that it's actually changing behavior would show up as deposit costs rising faster than can be explained by rates or competition alone. Until that happens, he wrote, "the disruption thesis remains conceptual." He's also flagged a deeper question for banks to answer: who ends up owning the agent, the wallet, and the customer relationship.

In other words, this isn't a today problem so much as a metric to track going forward — deposit betas, non-interest-bearing balances, and funding costs, not app download rankings.

This has happened before — just without the AI

Charles Schwab already lived through a version of this in 2023, when rising rates sent customers moving billions out of low-interest accounts and into higher-yielding money market funds. That shift forced Schwab to lean on more expensive short-term funding and dragged on profits for the rest of the year. The current AI-driven version of the same dynamic is arriving on top of an already tightening backdrop: the Federal Reserve has been raising rates, bank lending growth has picked up this year, and the U.S. personal savings rate is sitting near a four-year low — all of which put banks in greater need of deposits at the exact moment it's getting easier for customers to leave.

How banks are already playing defense

Some of this defensive positioning predates Muse. Citigroup rolled out a new savings rate initiative this week aimed at holding onto more of customers' existing cash and other balances, following similar moves from PNC and Bank of America to attract higher deposits. JPMorgan Chase CEO Jamie Dimon has floated a not-yet-released wealth product called Smart Cash, while Bank of America already runs CashPro, a cash management and forecasting platform built for corporate treasurers. The common thread: banks are trying to make holding cash with them more rewarding before an AI agent convinces customers to look elsewhere.