The popular small investor online forum WallStreetBets (WSB) had been on average producing sound investment advice, a team of researchers concluded. The Reddit forum, now sporting over 10 million subscribers, gained spotlight after many of its users organized to buy GameStop stock earlier this year, starting a buying spree that boosted stock price of the video game retailer tenfold. The impact has drawn attention of establishment market players, lawmakers, and regulators. Contrary to some criticism of the forum users as unsophisticated, if one followed advice of stock analysis posts on the forum in the past few years, one would have made significant returns, found researchers from the University of South Florida (USF) and University of Kentucky. They noted the forum has massively expanded in recent months—a change their initial analysis doesn’t capture. The team looked at posts tagged as market research or “due diligence” (DD) by the users. They only …