The following short video contains two months of correlations of non-equity ETFs and their relationships with the S&P 500 (SPY) and concludes with the regression formula for using the VIX (VXX) to predict SPY: [https://www.youtube.com/watch?v=0RUCHf5o1\_Q](https://www.youtube.com/watch?v=0RUCHf5o1_Q)