Other relatively small AI plays have also generated investor attention lately. One is SoundHound AI Inc. (SOUN), which now has a market cap worth $1.5 billion and started seeing stock momentum earlier this year after Nvidia Corp. (NVDA) listed a stake on its own 13-F filing with the Securities and Exchange Commission. SoundHound generated roughly $17 million in revenue during its latest quarter while racking up an $18 million net loss. SoundHound's stock was down 12% in Tuesday's session, while shares of C3.ai Inc. (AI), which is worth $3.8 billion in market cap, were down about 8%. -Emily Bary This content was created by MarketWatch, which is operated by Dow Jones & Co. MarketWatch is published independently from Dow Jones Newswires and The Wall Street Journal.