U.S. stocks were mixed in midday trading, with housing companies pressured after construction spending fell 0.5% in July to its lowest level since October 2023. The iShares U.S. Home Construction ETF lost almost 2%, while Builders FirstSource fell 4%, LGI Homes dropped 3% and Home Depot tumbled 2%. AI infrastructure stocks also declined as investors reduced risk: the iShares A.I. Innovation and Tech Active ETF fell more than 1%, Lumentum dropped more than 5%, Teradyne fell 5% and Coherent shed 2%. Moderna gained 5%, extending its August surge of 156%, after positive initial results from a late-stage cancer-vaccine trial jointly produced with Merck. Palo Alto Networks fell more than 5% ahead of its Tuesday earnings report, with FactSet analysts expecting earnings of 98 cents per share on revenue of $3.35 billion; the Global X Cybersecurity ETF dropped 5% and CrowdStrike lost more than 6%. Apple rose 3% as John Ternus took the helm on Tuesday and Tim Cook moved to executive chairman after serving as CEO since 2011. Fervo Energy surged more than 25% after announcing a 396-megawatt power purchase agreement with Google, which the company called the largest enhanced geothermal power purchase agreement to date. Chipmakers declined as Treasury yields rose, while energy stocks advanced alongside oil prices amid continuing Middle East tensions. Novartis gained 6% on multiple sclerosis trial data, Duolingo rose 5% after an Evercore ISI upgrade, and Medtronic added 2% after raising its fiscal 2027 outlook.