US stock futures were mixed early Thursday amid fresh doubts about President Trump's ability to end the war with Iran and a potential shake-up to the booming AI trade.

Futures attached to the Dow Jones Industrial Average (YM=F) rose around 0.5%. Futures attached to the benchmark S&P 500 (ES=F) fell roughly 0.5%, while futures attached to the tech-heavy Nasdaq 100 (NQ=F) tumbled around 1.3%.

Broadcom (AVGO) shares sank in premarket trading after its AI chip forecast disappointed, raising questions about the strength of the broadly booming AI trade. Broadcom tumbled over 12%.

Meanwhile, on Wednesday evening, following the most serious escalation between the US and Iran since the April ceasefire took effect, the House of Representatives voted to end the war in a rebuke to Trump. Earlier in the day, stocks retreated from records, and oil rose as hopes for a quick Iran deal faded.