Bank of America closes down 5.1%, biggest one-day drop since April 2025

A single-session drop of this size in a large US bank is a sentiment signal as much as a price move: it suggests the market is repricing something broader about bank exposure rather than reacting to company-specific news, which the item does not identify. The read-across matters most for peers and for anyone holding bank equity as a proxy for rates or credit conditions. Whether the move stays isolated to Bank of America or spreads across the sector is the open question, and the absence of a stated catalyst leaves room for more than one explanation.