Shares of Nvidia (NVDA) are rebounding in Tuesday's session after a three-day sell-off. Interactive Brokers Chief Strategist Steve Sosnick joins Market Domination to discuss Nvidia's stock movement and the broader tech rally.

"It's Nvidia's market and we're all just trading in it," Sosnick explains. He notes how Nvidia has been spearheading the tech sector's growth (XLK) and the broader market rally (^DJI, ^IXIC, ^GSPC). While the tech sector's rally may spark concerns, he notes that its recent dip isn't a problem "because of end-of-the-quarter factors making it more of a rotation."

"These companies do earn very good money. And someone asked me today, 'Would you buy Nvidia at these levels?' And my comment was kind of neither here nor there because it's not cheap, but it's not expensive either, because they do earn ridiculous amounts of money. It's just how much growth is priced in," Sosnick explains.

He points to "weaponized FOMO" as one of the themes driving the market rally:

"For institutional portfolio managers, it's the real deal. And the reason being is they can't be behind their peers. So, if that guy over there is making a ton of money in Nvidia or that guy's making it in GameStop (GME), I may not have put all my chips on the table. That's fine. But if I'm an institutional investor, I can't professionally be in that bottom quartile. I can't miss this rally," he explains. Sosnick adds that this creates a "piling effect" where stocks become very heavily weighted.

For more expert insight and the latest market action, click here to watch this full episode of Market Domination.

This post was written by Melanie Riehl