Steve Huffman on the subreddit causing chaos on Wall Street. : Whether you are in the stock market or not, you have probably heard in the last 24 hours about GameStop. Shares of the struggling video game store became the target of millions of non-professional retail investors on a Reddit forum. Shares of the company have soared nearly 800% over the past week, driven by anonymous posts on the Reddit forum, WallStreetBets. The forum boasts millions of members.