Top Stock Market Losers After the Opening Bell (Dec. 12, 2025): Broadcom Leads Decliners as AI Margin, Capex Fears Hit Tech
Broadcom shares fell about 7.8% at the open Friday after management warned of lower gross margins tied to its AI systems business. Semiconductor and data-infrastructure stocks led early declines on the Nasdaq and S&P 500, with Micron, SanDisk, and Western Digital also down. The Dow held steadier as investors rotated out of crowded AI trades.