Pairs Trading Quant Interview Guide
Pairs trading quant interview guide covering pair selection, spread construction, hedge ratios, z-scores, entry and exit rules, and risk.
Candidates discussing relative value and mean reversion between related securities.
Pairs trading compares related assets
A pairs trade takes opposing positions in related securities when their relative price relationship deviates from a historical or modeled norm.
Pair selection is not cosmetic
Related business exposure, sector membership, liquidity, borrow availability, and stable relationship evidence all matter before testing a pair.
Concrete example
If two related stocks usually move together and one suddenly underperforms, a strategy might buy the laggard and short the leader.
Hedge ratios define the spread
The spread can use dollar, beta, regression, or cointegration hedge ratios, and each choice changes risk and interpretation.
Common mistakes
Candidates often pick pairs by visual similarity. A good answer includes formation logic, validation, costs, and breakdown scenarios.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.