Shares in the video game retailer more than doubled at one point after a prominent meme stock investor made his first online posting in about three years.

A year after the "meme stock" phenomenon, GameStop continues to perform far above investment experts' predictions.

State and federal regulators have launched numbers probes of the popular stock trading app, just as it hopes institutional investors and its own users will buy up its stock.

The House Financial Services Committee held a hearing where members probed major players in the GameStop and meme stock story.

The GameStop stock saga has risen into a movement fueled by a wave of emotions from the 2008 global financial crisis that are still raw.

Taxes may lack the razzle dazzle of meme-fueled stock rallies. But they might prove a better way to curb Wall Street excesses.

Jaime Rogozinski, a former moderator of the now-famous Reddit forum that sent GameStop stock soaring, saw the chaos coming. For too long, Wall Street has been "an invite-only club," he says.

The video game retailer's shares shoot up, the online broker Robinhood struggles for cash and securities regulators issue a stern warning for anyone trying to game the market.

Jon Stewart and Ted Cruz are among other high-profile people who took to Twitter to comment on the stock story gripping the country.

GameStop has seen its stock soar, driven higher by a group of amateur day traders on Reddit, who are taking on Wall Street hedge funds. The frenzy has gotten the attention of regulators and lawmakers.

A primer on what you need to know about short selling as an army of amateur investors battles it out against hedge funds.