Published on October 30, 2026 at 4:00 PM Comment 1 𝕏 Print © 01net $500 billion wiped out in a single trading session: Alphabet has just recorded the worst stock-market day in its history. And the culprit was born in its own laboratories. Alphabet’s stock plunged nearly 13% on Thursday, wiping out approximately $500 billion in market capitalization. Never before seen for Google’s parent company since it went public in 2004, the previous record, an 11.63% d