Shares of the fast-growing voice AI company look overheated.The promise of artificial intelligence (AI) has not just fueled share price gains for the "Magnificent Seven" stocks, but also for a group of smaller, pure-play AI stocks. Some of these have generated excellent returns in a short time for investors -- among them, conversational AI company SoundHound AI (SOUN 1.83%). Its share price is up by around 45% from where it traded when it went public through a reverse merger with a special purpose acquisiti ...