Oddsmath – Odds conversion and implied-probability macros for wagering-market documents

Expandable macros (xfp-based) for documents about wagering markets: convert between decimal, American and fractional odds; compute implied probabilities; remove the bookmaker's margin (overround) to obtain fair probabilities in two- and three-way markets; and calculate expected value and Kelly stake fractions. Written for teaching materials and working papers on market calibration.

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