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Generated 2026-10-05 | spec 13D/E/F. Headline relations re-estimated across universes, regimes and rolling windows.

6A Universe robustness (IC / partial-IC)

pairfulllarge100halfAhalfBsign-stable
avg_corr20->momls_fwd21-0.094-0.119-0.060-0.102YES
breadth_sma200->momls_fwd21+0.072+0.072+0.108+0.046YES
breadth_sma200->spy_vol_fwd21-0.145-0.121-0.138-0.151YES
corr_spy60->flagship_mdd_fwd21+0.051+0.018+0.049+0.052YES
corr_spy60->spy_vol_fwd21+0.059+0.034+0.063+0.056YES
disp20->spy_vol_fwd21+0.245+0.260+0.222+0.247YES
top10_dvwt->eqmom_vol_fwd21+0.324+0.324+0.218+0.319YES

6B Regime split (full universe)

pairhigh_vollow_volbullbear
avg_corr20->momls_fwd21-0.093-0.137-0.078-0.049
breadth_sma200->momls_fwd21+0.154-0.038-0.049+0.245
breadth_sma200->spy_vol_fwd21-0.372+0.019-0.067-0.050
corr_spy60->flagship_mdd_fwd21+0.050+0.026+0.086-0.168
corr_spy60->spy_vol_fwd21+0.033+0.022+0.013-0.052
disp20->spy_vol_fwd21+0.265+0.198+0.179+0.409
top10_dvwt->eqmom_vol_fwd21+0.209+0.382+0.371+0.161

6C Rolling 3y window stability (full universe)

pairwindowsmeanminmaxfrac same sign
breadth_sma200->spy_vol_fwd2168-0.447-0.744-0.154100%
disp20->spy_vol_fwd2168+0.285-0.010+0.77499%
corr_spy60->spy_vol_fwd2167+0.319-0.311+0.63691%
top10_dvwt->eqmom_vol_fwd2168+0.140-0.180+0.49384%
corr_spy60->flagship_mdd_fwd2167-0.155-0.364+0.28884%
avg_corr20->momls_fwd2168-0.138-0.408+0.07296%
breadth_sma200->momls_fwd2168+0.130-0.117+0.36785%

Verdict

  • 7/7 headline pairs keep the same sign across all four universes (full, large100, two random halves).
  • Regime table shows whether the relations are concentrated in high-vol/bear windows (a concern for a volatility-based overlay) or hold unconditionally.
  • Rolling-window 'frac same sign' near 100% means the relation is stable through time, not driven by one episode.

The risk-prediction relations are expected to be the robust part (vol clustering); the momentum-spread/correlation relation is the one to watch for instability.