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Citron Research's Andrew Left, who gained notoriety for successful bets against companies such as Valeant Pharmaceuticals.

He called Ubiquiti Networks a "fraud" during a televised interview Monday.  "The word 'fraud' I use very judiciously," the short-seller said in an exclusive interview on CNBC's "Halftime Report."

Left said it will be interesting to see what happens next month when Robert Pera has an option to buy the rest of the Grizzlies NBA team, which will require more due diligence on his company by the league.

"The more sunlight you put on a fraud, the more chance it has of being exposed," Left said.Shares of Ubiquiti plunged 10 percent after the short seller released his bearish report on the company Monday morning.
The company makes wireless networking products.