The story
swisstony doesn't make one big call; it makes thousands of small ones. The account trades sports almost exclusively — roughly 97% of its profit, by analysts' counts — buying and selling at margins too thin for a human to bother with, on more than $1.8B of volume.
The Financial Times analysed 170 million Polymarket bets in October 2026 and found swisstony to be the single most profitable account since April, at around $12M over that stretch.
Its best-known run came at the 2026 World Cup, where it repeatedly took the other side of heavily-backed favourites. Arkham reported about $9.5M of profit from the tournament; the biggest single win on record is Germany NOT winning on June 25, bought at around 45¢.
On Polynyx swisstony is tagged a bot: its trading is high-frequency and two-sided, so its P&L is a business more than a forecast — which is exactly what makes it fascinating to watch.
