Parameter Optimization
Parameter optimization is the process of selecting the best settings for a trading model to maximize performance metrics like Sharpe ratio or total return. While necessary, it is the primary driver of curve fitting when taken to the extreme.
Traders often test thousands of combinations of moving averages, thresholds, or risk parameters to find the ones that performed best historically. This creates a risk where the selected parameters are only optimal for that specific window of time.
In the context of financial derivatives, over-optimizing parameters can lead to a strategy that ignores the Greeks or sensitivity to underlying asset volatility. Proper optimization should focus on stability and economic rationale rather than simply chasing the highest historical return.