Jamie Dimon, chief executive of J.P. Morgan, delivered a rare warning alongside the bank’s record $21.2 billion quarterly profit: the firm is “over-earning” because its income has become dangerously dependent on the artificial intelligence sector. The admission, viewed from Frankfurt as a signal of structural fragility, came as US regional lenders also reported broad second-quarter gains, with loan growth averaging 7% year-on-year and capital markets fees surging 55% across six major regionals. The common thread is a lending and advisory boom tied to technology firms borrowing heavily to fund AI infrastructure, a concentration that Dimon cautioned could trigger a banking crisis if doubts about AI’s rapid commercial breakthrough grow.

Across Wall Street and Main Street, the mechanism is the same: corporate clients, having paused investment during earlier tariff uncertainty, are now capitulating and borrowing regardless of interest rates. Fifth Third Bancorp’s finance chief described a sense that “you cannot wait for lower rates any longer,” while US Bancorp cited demand from food, media, and power sectors alongside private credit funds. The rebound is broad, but the outsized contribution of AI-related bond issuance and equity deals—including Elon Musk’s SpaceX—has created what analysts in London describe as a lopsided profit engine. Should the AI investment cycle stall, the reversal would hit bank earnings and balance sheets simultaneously.

In Jakarta, the debate is not about over-earning but about whether official liquidity data reflects reality. Bank Indonesia’s latest business survey showed activity expanded in the second quarter, with a weighted net balance of 12.97%, and the central bank insists liquidity is adequate, pointing to a decline in the overnight interbank rate to 6.17% and Rp837 trillion in monetary operations. Yet Finance Minister Purbaya Yudhi Sadewa, chairing the financial system stability committee, publicly stated that the indicators used to gauge liquidity are flawed, citing direct complaints from banks that “the money isn’t there” despite ample headline figures. The central bank pushed back, emphasising that double-digit base money growth and falling short-term rates confirm sufficient funds for intermediation.

The dispute exposes a tension between aggregate data and on-the-ground credit conditions that could affect policy coordination in Southeast Asia’s largest economy. Bank Indonesia has pledged to intensify communication with lenders to resolve distribution bottlenecks, while the stability committee is reviewing its monitoring framework. Globally, the next factual milestone is the US weekly jobless claims release on July 23, which will offer a fresh read on the economic momentum underpinning the lending surge. For now, the banking sector’s strength rests on an AI investment cycle that even its most powerful leader views with unease.