Reddit 'was well within the bounds' of its policies -CEO

"...it's important to understand that WallStreetBets is one of many finance- and investing-related communities on Reddit. This particular community specializes in high-risk, high-reward investments than what you might find in other, more conservative financial communities," Huffman said.

Wall Street hedge fund managers, the chief executives of Robinhood and Reddit, and a YouTube streamer known as Roaring Kitty were grilled on Thursday by U.S. lawmakers about the rally in shares of GameStop Corp.

Some of Wall Street's most powerful players, including billionaire Republican mega-donor and Citadel CEO Ken Griffin, made rare public defenses of their business practices as lawmakers probed how Reddit users trading on retail platforms squeezed hedge funds that had bet against shares of the video game retailer and other companies.