Plain Sharpe
Measures the selected series but does not know how many alternatives were discarded.
DSR helps distinguish rare quality from the expected winner of a large search and stays beside the complete trial history.
Challenge the candidate before risk
Measures the selected series but does not know how many alternatives were discarded.
More trials raise the benchmark the selected candidate needs to exceed.
Skew and kurtosis affect confidence in the observed Sharpe.
DSR does not prove an economic mechanism or replace holdout and walk-forward.
Treat holdout, time stability, multiple-testing correction and stress paths as separate evidence. Agreement matters more than one green metric.
Protect unseen data
Record every trial
Accept FAIL and insufficient data
Validation verdict
Historical, statistical and model results do not promise future returns. kquant provides computational tools and technical execution, but does not assess whether a specific trade is suitable for a user.