When there's drama in the stock market, I often learn about it at the gym. Case in point: the recent headline-grabbing hullabaloo about GameStop and Reddit.

Apparently, some limited partnerships (the slang is "hedge fund") decided to "short" the shares of several companies. It appears a number of traders on the WallStreetBets forum on the social news platform Reddit decided to "punish" the short investors and manipulate the market by driving the stock price of the companies up. I suspect their unstated goal was to profit by forcing the short sellers to cover their shorts, causing the price to increase, eventually cashing out themselves while the stock was high, thereby banking millions.

As a way of getting others to help drive up the stock price, they spun this manipulation as a revolt of "the people" against the "evil hedge funds" and a "rigged" stock market.

Hedge funds specialize in making sophisticated alternative investments designed to protect investment portfolios from market uncertainty while generating positive returns in both up and down markets. Because they are illiquid and can have higher risk than a plain vanilla investment like a mutual fund, the SEC protects small investors from potential financial harm by prohibiting them from owning shares in hedge funds. These funds are neither inherently "evil” nor owned only by the rich. Investors in hedge funds include state retirement plans, and teacher, fire and police pensions.

Typically, investors buy stocks when they think they will rise in value. This is calling being "long." However, it’s also possible for any investor (not just hedge funds) to profit if they think a stock’s value will go down. In "short selling," investors borrow shares of stock (as opposed to money), then sell the stock. The goal is to use the proceeds to buy the shares back at a lower price, repay the loan of shares, and keep the difference.

Short selling is beneficial to stabilize markets and help prevent financial bubbles and fraud. Warren Buffet says, "There is nothing evil, per se, about selling things short," pointing out that financially sound companies can benefit from short sellers because those traders are forced to buy the stock back in the future.

Still, extreme volatility in a stock is seen as a sign of suspicious activity that may trigger an SEC investigation. Therefore, a number of brokerage firms, including Robinhood and TD Ameritrade, limited trading in GameStop, AMC Theaters, Bed, Bath and Beyond, Nokia, Blackberry, Express, Koss, and Naked Brand Group.