https://www.reuters.com/article/us-retail-traders-squeezes-history/factbox-the-long-and-short-of-it-gamestop-and-other-market-squeezes-idUSKBN2A22OE >Last week's frenzied battle over GameStop that pitted retail traders against Wall Street hedge funds joins a long line of tussles between investors going 'long' by buying shares and those seeking to turn a profit from 'short' trades.