Apropos Financial Planning

More research into making asset allocation decisions based on the trend of the P/E10 ratio might prove worthwhile. Such future research might include statistical significance testing, calculating up and down trend Sortino ratios, measuring the Sharpe and Sortino ratios for tactically allocated stock+bond portfolios and studying how trend-sensitive asset allocation strategies would have fared in the past. Finally, Kitces recent JFP article also suggests that studying the P/E5 ratio may also have some value.