Books vs Kalshi

Sportsbook consensus = DraftKings + FanDuel moneylines with the vig removed, averaged (SharpAPI, ~60s delayed, refreshed every 5 min). Book edge = consensus fair % − Kalshi YES ask − Kalshi fee: positive means Kalshi is cheaper than the books say the side is worth. This is a market-vs-market signal, graded live below; trust it only as far as its record.

Cheapest cover · all venues

Cheapest way to back both sides using DraftKings, FanDuel, Kalshi and Polymarket (fees included). Under $1.000 = an arbitrage. Books are ~60s delayed; Kalshi↔Polymarket arbs are tracked live on the arb tracker.

Book edges