Alphabet stock fell as much as 7.2%, the most intraday since February, after Google DeepMind VP John Jumper became its second top AI exec to leave in a week (Felice Maranz/Bloomberg)

Felice Maranz / Bloomberg: Alphabet stock fell as much as 7.2%, the most intraday since February, after Google DeepMind VP John Jumper became its second top AI exec to leave in a week — Alphabet Inc. shares tumbled on Monday following the departure of another high-profile artificial intelligence leader to a rival.