The S&P 500 CAPE ratio hit 40 for only the second time in 155 years, raising concerns about valuations, future returns and a possible market correction.
Bill Ackman is betting beyond AI with six new stock picks, while dumping Alphabet, Universal Music Group and Hertz as Pershing Square reshapes its portfolio.
Nvidia stock faces high expectations ahead of August 26 earnings as Wall Street watches AI growth, valuation, open-source models and Nvidia's next big story.
Walmart stock fell 9% after earnings despite beating estimates and raising guidance. The retailer will add Apple Pay and Google Pay Tap to Pay from August 24.