Shares of Nvidia (NVDA), which were trading in negative ground to start the session, have reversed and moved into the green after a tweet from short-selling focused research firm Citron Research.

In the tweet, Andrew Left's Citron said: "Citron buys $NVDA. This is the first time in 2 years stock offers an appealing risk-reward to investors. $NVDA still a player in AI and Data... will eat through inventory issue. We see $165 before we see 120."

Following the tweet, Nvidia shares are up $3.62, or 2.5%, to $148.32.