Nasdaq and S&P 500 Reverse Gains, Alphabet Stock Sinks

U.S. stocks reversed earlier gains as traders digested a sharp selloff in Alphabet following an AI leadership shake-up. The Nasdaq Composite fell 0.5% and the S&P 500 was roughly flat after opening higher, while the Dow Jones Industrial Average stayed stronger, up 0.9% or 507 points, though it also gave back part of its advance. Alphabet dropped 4.2%, making it the main drag on the broader market and underscoring how heavyweight technology stocks continue to drive index direction. The update also showed mixed cross-asset moves, with U.S. 10-year yields at 4.684%, gold up, oil higher, Bitcoin slightly lower, and futures indicating a modestly softer tone in U.S. equity markets.