Wall Street

Famed GameStop bull 'Roaring Kitty' is a Massachusetts financial adviser

Keith Patrick Gill is the person behind the Roaring Kitty YouTube streams which, along with a string of posts by Reddit user DeepF***ingValue, helped attract a flood of retail cash into GameStop, burning hedge funds who had bet against the company and roiling the broader market.

Short squeezes: Everything you need to know about the recent investing movement

Obviously, this level of volatility is highly unusual. The recent price action in GameStop and several other stocks can be attributed to a phenomenon known as a short squeeze. Here's a closer look at what that means, how it works, and why it can cause massive spikes in stock prices like we've seen this week.