Data design and provenance
This build uses deterministic synthetic monthly factors and portfolio excess returns because reuse permission was not verified for external observations. Variable conventions follow the teaching structure of the verified Kenneth French Data Library; no external observations are redistributed.
What expert work looks like
A professional tear sheet aligns dates and units, identifies the risk-free convention, compares nested economic stories, reports uncertainty rather than only exposure estimates, and separates in-sample description from investable out-of-sample evidence.