Replaces the ~0.5-0.7 estimate with the validated 2019-2026 real-ETF backtest: +1.20 Sharpe (realistic fwd ~0.8-1.0), -5.4% maxDD, positive every year incl 2022, beats 60/40 (+0.87/-21%) on Sharpe AND drawdown. Robust signals: low maxDD + every-year-positive. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>