Unit Root Process
Meaning ⎊ Stochastic process where shocks have permanent effects, causing non-stationary trends and preventing mean reversion.
Trend Persistence
Meaning ⎊ The statistical tendency for price movements to continue in their established direction over a specific timeframe.
Walk Forward Analysis
Meaning ⎊ A dynamic testing method using rolling data windows to evaluate strategy robustness and reduce curve fitting.
Walk-Forward Analysis
Meaning ⎊ An iterative testing approach that retrains models on a sliding window to simulate real-world adaptation to new data.
Walk-Forward Validation
Meaning ⎊ A robust testing method using iterative, time-sequenced data windows to validate strategy performance on unseen data.
Market Efficiency Hypothesis
Meaning ⎊ The theory that asset prices fully incorporate all available information, preventing consistent abnormal returns.
Rational Expectations Hypothesis
Meaning ⎊ The theory that individuals make decisions based on all available information, leading to unbiased future expectations.
Random Walk Theory
Meaning ⎊ Asset prices follow a random path making future changes unpredictable based on historical price data and patterns.
Random Noise
Meaning ⎊ Unpredictable and irrelevant market price fluctuations that create difficulty in identifying structural trends.
Random Walk
Meaning ⎊ A model where future price movements are independent of past data, implying market efficiency.
Random Assignment
Meaning ⎊ The fair, non-discriminatory method used to select which seller must fulfill an option exercise request.
Autocorrelation
Meaning ⎊ The statistical correlation of a time series with its own past values at different time lags.
Efficient Market Hypothesis
Meaning ⎊ The theory that asset prices incorporate all available information, making it difficult to consistently outperform the market.
