If he has an 80% chance to win that means Polymarket will be "wrong" 20% of the time. And 80% seems fair given he was leading in the polls by a razor thin but consistent margin.
Polymarket isn't binary so you are understating how wrong they were. Polymaket gives outcomes as percentage odds and less than 12 hours ago they had Bolsonaro by 5-to-1.
[–] jeffbee 4 days ago
[–] cowlevel 4 days ago