Last week investors were reintroduced to the terminology of 'short squeeze' and 'gamma squeeze'. It has been some time since the phrase gamma squeeze was bantered about as much as it was last week as the volatility in a few stocks captured headlines. Stocks like GameStop (GME) and the movie chain AMC Holdings (AMC) saw their stock prices swing widely, but mostly to the upside. So what is going on with a few stocks like this.