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Statistiche › Intraday e microstruttura del mercato › Retail order flow

Retail order flow predicted returns, and then the tradeable part of it stopped

One week ahead|t 15.14 then 7.952010 to 2015: 0.00092016 to 2021: 0.00060.0006Two weeks|t 9.48 then 3.462010 to 2015: 0.00062016 to 2021: 0.00030.0003Four weeks|t 5.64 then 2.022010 to 2015: 0.00032016 to 2021: 0.00020.0002Six weeks|t 4.53 then 2.102010 to 2015: 0.00032016 to 2021: 0.00020.0002Eight weeks|t 3.96 then 1.792010 to 2015: 0.00022016 to 2021: 0.00010.00012010 to 20152016 to 2021

Fama-MacBeth coefficients on retail order imbalance in dollar volume, predicting returns k weeks ahead. The point estimates fall by a third to a half and the t statistics fall by more. The figures come from a replication that reproduces the original tables with high precision; the original paper itself was not opened.

Retail order imbalance predicted next week's returns with a t statistic of 15.14 over 2010 to 2015. Over 2016 to 2021 the coefficient falls by a third and the long short strategy's alpha is no longer significant at any horizon across all stocks.

0.0009, t = 15.14Next-week coefficient on retail order imbalance, 2010 to 2015
0.0006, t = 7.95The same over 2016 to 2021
0.437% then 0.143%Small-cap one-week long short alpha, the two periods
28%Share of real retail trades the standard algorithm mis-signs

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