rows: 3550 dates: 71 emb_dim: 1280 trials K=151 per-fold AUC: [0.5, 0.44, 0.471, 0.561, 0.478] mean 0.490 permutation control AUC: mean 0.474 (chance baseline; real must exceed it) pooled-OOS IC(pred,fwd) = -0.0389 (n=3000) | momentum IC = -0.0418
top-decile pred +1.368% | EW +1.609% | mom-top +1.871% (n=60 dates) pred_top - EW : -0.241% CI[-1.075%,+0.665%] pred_top - mom: -0.504% CI[-1.832%,+0.863%]
Caveat: backfilled embeddings may overlap the model's pretraining corpus; single model/seed; purged CV but small n.