Tesla jumps 10% as stock split takes effect, Apple gains 4% - CNBC

Apple CEO Tim Cook greets customers at the grand reopening of Apple's flagship Apple Fifth Avenue retail store on September 20, 2019 in New York City.

Taylor Hill | Getty Images

Shares of Apple and Tesla rose sharply Monday, the first day of their stock splits.

Apple advanced 4% and was the best-performing component in the Dow Jones Industrial Average. Tesla jumped around 10%.

Monday's gains are the latest in a string of strong performances since the companies announced the stock splits.

Apple said July 30 its board approved a 4-for-1 stock split. Since then, the stock is up more than 32%. Tesla has skyrocketed more than 70% since it announced a 5-for-1 stock split on Aug. 11.

Billionaire investor Leon Cooperman, however, said Monday that run-ups on the back of stock-split announcements are a troublesome sign for the market.

"Look at Tesla and Apple: Everybody understands that splits don't create value," the founder of Omega Advisors told CNBC's "Squawk Box." "My dad once told me if you gave me five singles for a $5 bill, I'm no better off."

Monday's gains in Apple and Tesla came amid high volume as smaller traders are able to snap up shares in both companies at a much lower price than on Friday.

Through the 90 minutes of Monday's session, Apple had traded 82.7 million shares, which is roughly 46% of the stock's 30-day volume average of 178.588 million. Tesla shares had exchanged hands 37.4 million times, more than half of its 30-day volume average of 73.369 million.

This year, smaller traders have been more actively participating in the market as commission-free online brokerage Robinhood grows in popularity. But Cooperman sees this as a potential sign of being overheated.

"I see signs of euphoria creeping into the market: the IPO SPAC market is one, [and] the craziness in many of the stocks that the Robinhood crowd has latched onto," Cooperman said. "You see a Kodak go from $1.50 to $60 and from $60 to $6 in a very short period of time … and when you look into it, it's the Robinhood crowd taking it up."

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