Archegos, GameStop events offer lessons on risk.

The two market crises that dominated the first quarter of 2021 offer important lessons about risk and changing market dynamics, even if they don't prompt changes in investments. In the case of the retail trading blitz around GameStop, Mr. Blitz said "short squeezes are really problematic if a hedge fund's long positions are also going down and the manager has to liquidate both long and short positions at the same time. [Extracted from the article]