After completing the series on creating an inter-day mean reversion strategy, I thought it may be an idea to visit another mean reversion strategy, but one that works on an intra-day scale. That is, we will be looking for the mean reversion to take place within one trading day.
Stock prices tend to follow geometric random walks, as we are often reminded by countless financial scholars; but this is true only if we test their price series for mean reversion strictly at regular intervals, such as using their daily closing price. Our job is to find special conditions where mean reversion occurs with regularity. As the following strategy will show, there may indeed be seasonal mean reversion occurring at the intra-day time frame for stocks.