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NexQuant/rdagent/components/backtesting
TPTBusiness 935adde6c5 fix(backtest): replace broken MC permutation test with binomial win-rate test
The previous monte_carlo_trade_pvalue() used sum(permuted_trades) as test
statistic, which is permutation-invariant (sum is commutative), so beat/n
was always 1.0 and MC_p was always 1.00 for every strategy.

Replace with a one-sided binomial test on trade win rate vs 50% baseline.
Tests whether the observed win rate could occur by chance under H0: p=0.5.

Also add _shift_daily_constant_factor_if_needed() to predix_full_eval.py
so re-evaluations apply the look-ahead bias correction for daily factors.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-24 09:55:45 +02:00
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