While the historically challenging month of September (average decline for S&P 500 of -1.2% since 1926) started on the wrong foot (down -4.25%), the trend turned quickly enabling stocks (and bonds) to post another winning month. The intra-day graph below of the S&P 500 (red line, left axis) and long term U.S. bonds (white line, right axis) highlights their flip-flopping correlation, from negative to positive to negative. After the fourth trading day of the month, several items catalyzed the change in investor sentiment.