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Difficulty: Easy
Category: time_series
Practice quant interview questions from top firms including Jane Street, Citadel, Two Sigma, DE Shaw, and other leading quantitative finance companies.
Topics: time-series, cointegration, ols, adf, pairs-trading, statistics
The Engle-Granger two-step procedure tests if two time series are cointegrated, meaning they share a common stochastic trend. This is crucial in quantitative finance for identifying mean-reverting spreads in pairs-trading and statistical-arbitrage strategies. The test first estimates a long-run relationship via OLS and then applies a unit-root test to the residuals to confirm cointegration. Task Implement the function solution(x: list, y: list) -> list to perform the Engle-Granger two-step coin
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