GoldRegime_X/reports/root_cause_v2_M15.csv

1	timeframe	dominant_stage	dominant_marginal_loss_pct	explanation
2	M15	HMM	97.88200513584083	Dominant bottleneck: HMM stage removes 97.9% of candidates that reached it. This is the marginal loss (relative to survivors of the previous stage), not the total loss versus Generated, so it is not misattributed to signal generation.