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The WallStreetBets subreddit took the financial world by storm this week, putting hedge funds at the edge of their seat. Here's everything you need to be equipped for the inevitable conversation about why GameStop's stock is rising, what short squeeze means, and how a Reddit trader sparked the Wall Street revolution.

(Bloomberg) -- The best thing to happen to Dan Och, financially speaking, may have been leaving the hedge-fund firm he founded more than two decades ago.