This statistical arbitrage strategy has underperformed the S&P 500 since its inception in March 2011, with annualized returns of -4.74% compared to -8.06% for the S&P. It has lower volatility, beta, correlation, and maximum drawdown than the market. While it had negative returns on three of the S&P's best days, it was positive on two of the market's worst three days over the period.