MOASS, Mother of All Short Squeezes, is a trading strategy in which a high volume of buyers drive up shares of stocks that were being “shorted” by other investors.

What does the term shorting a stock mean?

Shorting, or short-selling, is when an investor borrows shares and immediately sells them, hoping he or she can scoop them up later at a lower price, return them to the lender and pocket the difference. But shorting is much riskier than buying stocks, or what's known as taking a long position.

What does heavily shorted stock mean?

When a stock is heavily shorted, and investors are buying shares — which pushes the price up — short sellers start buying to cover their position and minimize losses as the price keeps rising. This can create a “short squeeze”: Short sellers keep having to buy the stock, pushing the price up even higher and higher.