Stats › Saisonnalité et calendrier › Pre-holiday returns
The pre-holiday premium became a small-firm effect and vanished in large caps after 1990
Mean return on the trading day before eight US holidays, CRSP indices. The equal-weighted effect survives out of sample with a difference t statistic of 6.76. The value-weighted effect falls to a difference t statistic of 1.92 and its regression coefficient is insignificant once weekend and turn-of-year effects are controlled.
The day before a US holiday returned 0.49% equal-weighted and 0.37% value-weighted over the original 1963 to 1982 sample. Out of sample from 1983 the equal-weighted effect holds at 0.37% while the value-weighted version loses significance once other calendar effects are controlled.
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