Following a record-breaking 104 matches, Spain were crowned world champions after defeating Argentina 1-0 in extra-time in the 2026 World Cup Final. History wasn't just made on the pitch as the USA, Canada and Mexico co-hosted the 23rd edition of the tournament, it was one of the biggest sports prediction markets ever.
Kalshi processed a reported $27 billion of trading across World Cup prediction markets, according to Reuters, attracting around three million users as traders continuously reassessed each nation's chances of lifting the trophy.
In this prediction market analysis we look at if the tournament's strongest team was correctly identified, traders avoided overreacting to one big eye-catching result, and if USA's home advantage was accurately priced in.
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Spain were deserved favourites all along
Despite Argentina coming into the World Cup as defending champions with Lionel Messi as their totemic leader, the usual hype and hysteria around England's chances and Kylian Mbappe's France having a squad packed full of elite talent, World Cup prediction markets consistently rated Spain as the tournament's strongest team.
While confidence dipped briefly after their shock 0-0 draw with Cape Verde in their opening game, traders quickly restored Spain to clear favouritism as the tournament progressed.
The Euro 2024 winners were correctly identified as the strongest team pre-tournament, coming in as the most probable winners on Polymarket's pre-tournament outright market at 16.95%, narrowly ahead of France at 16.05%. England and Portugal were level behind them, and Argentina completed the leading group. All of Spain, France, England and Argentina ultimately reached the semi-finals.
Rather than simply predicting the eventual winner, the markets accurately identified the tournament's strongest teams before a ball had been kicked.
Spain's opening 0-0 draw with World Cup debutants Cape Verde slightly dented confidence, with their outright probability slipping to 15.1% as France briefly moved to the top of the market at 18.3% following their impressive 3-1 opening day win over Senegal.
However, as Spain re-established themselves with more convincing performances through the knockout rounds, traders steadily rebuilt confidence and they were once again clear favourites before both the semi-final and final. Before the semi-final fixture with France, they had market favouritism at 58% and that narrowly crept up to 59% for the game against Argentina.
Was Germany's early exit really such a shock?
With the joint-second-best record in FIFA World Cup history, Germany are always in the conversation when it comes to challenging for the trophy.
However, Polymarket gave the four-time world champions an implied probability of just 5.25% to go all the way before the tournament began, well behind Spain, France, England, Portugal, Argentina and Brazil, who all entered as stronger contenders.
After demolishing tournament debutants Curacao 7-1 in their opening game, there was growing opinion that Julian Nagelsmann's side could mount a serious challenge. The market moved, but barely: Germany ticked up to a little over 6% in the days after the win, a gain of around one point. One emphatic victory over weaker opposition was not enough to overturn the broader view that Germany remained outside the tournament's leading contenders.
Subsequent performances justified that caution. In their second game against Ivory Coast they needed a stoppage-time goal to seal a 2-1 win, before being beaten 2-1 by Ecuador in their final group match.
So when Paraguay eliminated Germany in the first knockout round via a penalty shootout, the result felt like a major upset to many supporters, but far less so to prediction markets. Germany's loss was ultimately Spain and France's gain, who occupied the same side of the draw, as traders quickly redistributed Germany's implied probability among the remaining contenders.
Home advantage was never going to be enough for USA
With a high-profile coach in PSG and Tottenham manager Mauricio Pochettino on the touchline, and the backing of a fervent home support, belief and optimism around the USA grew quickly after an emphatic 4-1 victory over Paraguay in their opening match.
The hosts began with an implied probability of just 1.15% to win the tournament, and that thumping win over the South Americans and then 2-0 success over Australia raised expectations, with traders lifting the USA's outright probability to a peak of 3.75% in late June.
However, prediction markets never elevated the USA into the same bracket as Spain, France or Argentina. Home advantage, a favourable group containing Paraguay, Australia and Turkey, and a relatively kind route into the knockout stages all increased expectations of a respectable run, but not a realistic challenge for the trophy.
Ultimately, that proved to be a fair assessment. Amid the controversy of Folarin Balogun having his ban for a red card in the previous game against Bosnia 'suspended', a fired-up Belgian side powered to a 4-1 win, bringing the USA's World Cup to an end at almost exactly the stage the market had anticipated.
Despite the USA's confident, high-scoring performances during the group stage, traders resisted overreacting to the early momentum, and the scale of that restraint is the striking part. Their implied probability rose only from 1.15% to a peak of 3.75%, never once reaching the level a single good group stage tends to buy a host nation. The market consistently viewed Pochettino's side as dangerous outsiders capable of reaching the knockout rounds, but never as a realistic challenger to the tournament's elite.
What the 2026 World Cup tells us about prediction markets
The 2026 FIFA World Cup demonstrated how prediction markets work and how they can provide accurate assessments of sporting outcomes.
Rather than being biased by fan, pundit and public sentiment, prediction markets aggregate thousands of individual opinions into continuously updated probabilities as new information emerges.
Throughout the tournament, prediction markets analysed longer-term data and underlying performance, rather than emotional, sentimental or immediate shorter-term thinking. Spain remained among the favourites despite an underwhelming opening match, Germany's impressive win over weaker opposition did little to change expectations, and the USA's home advantage was recognised without overstating their chances of winning the tournament.
No prediction market can guarantee an outcome, but the 2026 World Cup showed how collective market sentiment can provide a measured view of a team's genuine prospects as new information emerges.
