Subject: Statistically Bizarre
Large-cap tech’s (XLK) (VGT) (IYW) latest run has gone from strong to statistically bizarre.

The S&P 500 Technology sector (XLK) recently outperformed the broader S&P 500 (SPY) (VOO) by 29.3 percentage points over the prior 50 trading days, according to data from DataTrek Research. That put the move roughly 6 standard deviations above normal, with “no other rally since 2015” coming close.

Ryan Detrick, chief market strategist at Carson Group, put the scale in blunt terms: a 6-sigma event is supposed to happen about once every 4M years under a normal distribution. In markets, of course, extremes happen more often than textbook statistics imply — but that is still the point. This was an extraordinary burst of relative strength.

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