Volume Shockers

In the past data we checked, the stocks this screen picked did worse than the ones it left out, by more than luck alone would explain. We looked back over 64 months. Each month we checked whether the stocks this screen picked did better, over the following month (21 trading days), than the stocks it didn't pick. We score that from -1 (the picks always did worse) to +1 (always did better); 0 means no pattern. This screen scored -0.0156. As a measurement, the score is very small, but clearly below zero. If the screen had no real edge, a score at least this far from zero would show up about 3 in 1,000 by luck alone. That does not mean the screen is wrong; it still works for narrowing a list of stocks by your own rules.

This is a record of the past, not a prediction.