Alphabet heads for a $500 billion drop in market value, the biggest in its history

Alphabet (GOOGL) is on track for its worst day ever. The stock fell about 13% Thursday after its third quarter results, steeper than any session since it went public in 2004. That puts nearly $500 billion of stock market value on the line, the second-biggest one-day loss ever for a US-listed company. Only Nvidia (NVDA) has lost more, about $593 billion on Jan. 27, 2025, the day China's DeepSeek rattled AI investors. Bloomberg, Yahoo Finance Alphabet would need to close at about $274.75, down roughly 15%, to take Nvidia's record, by Yahoo Finance calculations. It has already blown past the $400 billion SpaceX (SPCX) lost on June 22, the previous No. 2. In dollars, it's Alphabet's worst day by far. Its previous worst was about $275 billion on July 23.