Alphabet is the parent company of Google, YouTube, Android, Chrome, Waymo, and a variety of other leading-edge, high-tech ventures.
The stock started the year in a downtrend, then rallied to an all-time high of $408.61 in June. It then bounced around the $350 level until Thursday. After the release of the quarterly results, the shares plummeted, dropping 12.64% on the day, making it the worst in the company’s history.