Stock Splits Quant Interview Guide
Stock splits quant interview guide for split ratios, price adjustment, share count, volume adjustment, examples, and data errors.
Candidates working with adjusted equity prices and historical returns.
Splits change units
A stock split changes the number of shares and raw price scale, but not the simple economic ownership in the idealized case.
Return series need adjustment
Historical price and volume data often need split adjustment so returns, volatility, and indicators are not distorted by mechanical unit changes.
Concrete example
After a two-for-one split, a raw 100 price may become 50 and shares double. A split-adjusted series avoids showing a false minus 50 percent return.
Volume and shares also move
Volume, shares outstanding, market cap calculations, and per-share quantities may need separate treatment depending on the analysis.
Common mistakes
Candidates often adjust price but forget volume or share count. Strong data answers say exactly which fields are raw and adjusted.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.