Spurious Regression
Spurious regression is a statistical trap where two completely unrelated time series appear to have a strong, statistically significant relationship simply because they both contain a stochastic trend. This is a common pitfall when analyzing non-stationary data without proper testing.
In finance, one might mistakenly conclude that the price of one crypto asset is driving another, when in reality, they are both just moving randomly. Relying on such findings leads to disastrous trading strategies and failed risk models.
To avoid this, analysts must ensure that the series are stationary or cointegrated before performing regression analysis. It is a classic example of why statistical knowledge is as important as market knowledge.
It prevents traders from seeing patterns that are merely mathematical illusions.