The S&P 500 closed above 7,800 for the first time, with Treasury yields easing and gains led by Constellation Energy's 20-year nuclear deal with Google, Marvell's $90 billion revenue ambition, and Citi valuing AMD at $800, while storage stocks fell on a takeover fight for TDK.
Easing Treasury yields alongside a fresh index high signal broad risk appetite rather than a single-stock story. The nuclear power deal underscores rising data-center electricity demand, which can keep supporting power-linked names like Constellation Energy, while the AMD valuation and Marvell's growth ambition point to continued strength in chip-related stocks.