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Big-name quants were slammed in March, as their models struggled to keep up with the coronavirus-induced selloff. AQR's former head of machine-learning, Macros Lopez de Prado, said on a webinar hosted by alt-data company Thinknum on Friday that quants were too reliant on models and forecasts. He said they need to begin practicing "nowcasting"— reacting to real-time data instead of trying to predict the...