Shares in major US credit card issuers declined sharply after Donald Trump publicly called for a 10% interest rate cap on consumer lending charges. The proposal, backed by the White House, aims to limit what financial institutions can charge borrowers, a move that has rattled investors and raised concerns about the future profitability of the banking sector. Companies such as JPMorgan Chase, Bank of America, and Citigroup saw immediate market pressure as analysts assessed the potential impact on revenue streams heavily reliant on interest income.

The implications of such a regulatory shift would be profound, potentially squeezing profit margins and forcing lenders to restructure their credit card products. This policy push signals a broader political focus on consumer finance costs ahead of upcoming elections. It creates significant uncertainty for Wall Street, challenging the operational models of established credit card networks and issuers.

The market reaction reflects fears that a hard cap could disrupt lending practices and limit access to credit for some consumers, fundamentally altering the competitive landscape for these financial giants.