Economic Roundtable: Quant Quake, Quac-cidental Correlation
Image Source: Anders Sandberg. Last week, the markets may have revealed that internals aren’t all that healthy. Major equity markets experienced a “rotation” that reminded many investors of the “quant quake” from August 2007. As Valuentum’s Brian Nelson wrote in Value Trap, “just a few bad days in the market caused a rapid unwinding of many quant long-short strategies (back then). Goldman’s chief financial officer said at the time that the firm was witnessing ‘25-standard deviation moves, several days in a row.’” On the surface, markets last week seemed relatively calm, but as the episode in 2007 revealed the activity last week may just be the calm before the storm. Many are pointing to overcrowded trades in betting against certain … Read more