Teradyne Inc is trading 5.7% up at $432.73 as momentum continues following news of its upcoming addition to the Nasdaq-100 Index.
- The stock is rebounding sharply from a 5.3% drop in the previous session, extending a period of high volatility.
- Buying activity is driven by investors positioning ahead of anticipated demand from index-tracking funds prior to the June 22, 2026, inclusion date.