Earnings live: Block mass layoffs earn Wall Street's approval, Duolingo shares plunge

Fourth quarter earnings have slowed to a trickle after the blowout report from Nvidia (NVDA) capped results for the "Magnificent Seven" tech stocks. With just 4% of S&P 500 companies left to report results, the index is tracking a 14.2% earnings growth rate for the quarter, which would mark the S&P 500's fifth consecutive quarter of double-digit earnings growth. Nvidia's report was the marquee event this week, offering a crucial update on demand for high-tech AI chips — a big part of the hundreds of bil ...