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Shiller PE Ratio Usage

Use the Shiller PE Ratio to move from tracking momentum to identifying generational value opportunities.

  • Generational Investing: Identify buying opportunities when the ratio enters the Extreme Undervalued (Cyan/Blue) zones.

  • Risk Management: Exercise caution or hedge positions when the ratio enters the Extreme Overvalued (Red) zone, as forward 10-year returns are historically lower from these levels.

  • Mean Reversion Trades: Use the Historical Mean as a long-term target; markets that stretch too far from the mean often eventually revert.

  • Smoothing Analysis: Adjust the smoothing input to filter out monthly noise and focus on the secular valuation trend.

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