engine · Structural Arbitrage
When the Math Breaks
In a match where exactly one of Home, Draw or Away pays out, buying all three for $1.00 total is break-even — you're guaranteed to hold the winning share. When you can buy all three for less than a dollar, the difference is risk-free profit, with no view on the result required.
// WHY WORLD CUP PRICES BREAK
Polymarket prices each outcome as its own binary Yes/No market. The Home, Draw and Away markets for one fixture are traded independently — a fan piles into a favourite's Yes without touching the linked Draw and Away markets. Their Yes prices drift out of sync, and the three stop summing to exactly $1.00.
Both directions are tradeable. When the sum dips below $1.00, buying every outcome and holding to the final whistle collects the gap. When it rises above $1.00, the mirror trade applies. The window is brief — competing arbitrage closes it fast.
// WHAT POLYCUP SHOWS
The Bot Signal panel computes the live book sum for the match's three moneyline prices and flags whether it leaves slack big enough to clear Polymarket's ~2% fee. This is real, computed from the same prices shown in the Match Winner card.
Tournament structure adds a second layer unique to a World Cup: a team's odds to win its group and to win the trophy are logically bounded. When linked markets imply an impossibility, that's a structural discrepancy too.
See also: Overview · Follow the Whales · Live picks · Risk