Sometime back I read an academic research report basically saying all the market risk premium came before/after hours. Seemed incredible to me with the volume differences. Individual session change moves can get impressive as heck, but I have yet to run across any strategy with any real predictive power to benefit from them.
Curious to see if I could verify this claim from a direct, boots in the mud perspective, I built a quick daily bar strategy in TradeStation that simply computed performance of buying at each Close and selling at the next day’s open. After trying it over numerous timeframes, I couldn’t confirm any numbers with that huge degree of after-hours advantage. Maybe I screwed something up, but it’s pretty straight forward computation.
Anyone else run this test with results that match the first graph above?