No-vig price

Worked example

A market priced -110 / -110 implies 52.4% for each side, which sums to 104.8%. Normalizing each side by that sum removes the margin:

# Devig a standard -110/-110 market
        implied(-110)         = 110 / 210          = 52.38% per side
        implied sum           = 52.38% + 52.38%    = 104.76%
        no-vig probability    = 52.38% / 104.76%   = 50.0%
        no-vig price          = +100  # the fair price hiding under -110

Betting a side at a price better than its no-vig price is the definition of a +EV bet. Most public scanners compute the no-vig price from a sharp anchor such as Pinnacle.

Where it shows up in ParlayAPI

ParlayAPI's +EV scanner devigs the sharp anchor's two-way prices and compares every book's offer against that fair line. The same math powers no-vig CLV grading against the historical closing archive. Background reading: no-vig CLV explained.

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