Overfitting in Finance
Meaning ⎊ The failure of a model to generalize because it captures noise instead of the true signal in historical data.
Overfitting and Data Snooping Bias
Meaning ⎊ The danger of creating strategies that perform well on past data but fail in live markets due to excessive optimization.
Model Overfitting
Meaning ⎊ The failure of a model to generalize because it has been over-fitted to specific, non-representative historical noise.
Data Mining Bias
Meaning ⎊ The error of finding false patterns by testing too many hypotheses until a random one appears significant.
Alpha Decay
Meaning ⎊ The progressive loss of excess returns as market participants discover and exploit a previously unique trading edge.
Strategy Overfitting Risks
Meaning ⎊ The danger of creating models that perform perfectly on historical data but fail to generalize to new, live market conditions.
Overfitting Risk
Meaning ⎊ The danger of creating overly complex models that memorize historical noise instead of learning predictive market signals.
Technical Analysis Fallibility
Meaning ⎊ The limitation of technical analysis in predicting future price action due to its reliance on historical data.
Curve Fitting
Meaning ⎊ Over-optimizing a model to historical data, capturing random noise and failing to perform on future market conditions.
Backtesting Validity
Meaning ⎊ The extent to which a trading strategy's historical performance accurately predicts future profitability.
