Sports prediction markets saw concentrated trading around the NFL, US Open, Premier League and Champions League as several major competitions overlapped during the same seven-day period. MetaMask identified the four categories among the most-traded sports markets in its latest Alpha briefing, although major sporting results did not always translate into equally large changes in market pricing.
The September 11 briefing tracked how prediction-market probabilities and volumes reacted to individual games and tournament developments rather than measuring MetaMask wallet usage itself. The data showed substantial capital already trading in season-long markets, with shorter-term match markets attracting much smaller volumes.
NFL and US Open Markets React to Results
The NFL champion market had generated more than $52 million in cumulative volume since opening in February, including about $2.2 million during the preceding week. After the Los Angeles Rams lost 27-7 to San Francisco, their implied championship probability fell from 16.5% to 14.5%. The result produced only a modest repricing for the Rams despite a decisive 20-point defeat, while San Francisco’s probability rose from 3.45% to 6%.
Tennis produced a more dramatic move. Ben Shelton’s probability of winning the US Open stood at 7.15% while his quarterfinal against Carlos Alcaraz was still underway on September 8, before climbing to 36.3% two days later after his victory. Alexander Zverev subsequently reached the final and moved to 59%. The US Open winner market had accumulated roughly $25 million in total volume, with about $2.5 million traded during the week.
The contrast illustrates how prediction markets respond differently depending on how much a result changes the underlying competitive outlook. A single elimination match can transform tournament probabilities more sharply than one regular-season result affects a months-long championship market.
Soccer Futures Attract Millions in Weekly Volume
Premier League match markets were considerably smaller. MetaMask reported approximately $43,000 in trading on Manchester United versus Manchester City and around $23,000 on Tottenham versus Everton. Those figures were small compared with season-long football futures, which were trading in the tens of millions of dollars.
Champions League activity was considerably deeper. Barcelona led the 2027 championship market at 18.5% as of September 11, ahead of Bayern Munich at 15.5%, Arsenal at 14.5%, and PSG and Real Madrid at 12.5% each. Approximately $7.5 million changed hands during the week, representing nearly one-quarter of the market’s $31.7 million cumulative volume.
The figures show that headline sporting events can generate substantial prediction-market turnover without necessarily causing dramatic movements in longer-term probabilities. The key signal from MetaMask’s briefing is the growing scale of sports prediction trading, not evidence of increased wallet transactions or broader blockchain activity, with market depth varying sharply between individual fixtures and season-long outcomes.
