Stock market today: Dow, S&P 500, Nasdaq fall as Alphabet stock sell-off drags on tech, AI jitters return Yahoo FinanceAlphabet heads for a $400 billion drop in market value, the biggest in its history Yahoo FinanceStocks making the biggest moves premarket: Alphabet, Caterpillar, Eli Lilly, DoorDash & more CNBCStock Market Today: Nasdaq Futures Slump After Google Earnings Disappoint — Live Updates WSJMicrosoft Up, Google Down. A Tale of Two Hyperscalers. The New York Times