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Beginning with the US presidential elections in November 2024, when prediction markets catapulted into mainstream culture, their rise has been undeniable. Kalshi and Polymarket have seen their valuations balloon to $40 billion and $21 billion, respectively, and the majority of the top US bookmakers have scrambled to expand into the prediction space in various forms, either by building their own exchanges, acquiring existing ones or engaging in market-making.
Commercial sports betting generated just under $17 billion in nationwide revenue in 2025, which is why Davenport asserts that the “stakes of this case are exceptionally high”. Kalshi and Polymarket alone posted more than $45 billion in trading volume, which is similar but not identical to betting revenue, in August. That was a 15% decline from July, although that drop is attributed to the conclusion of the Fifa World Cup tournament that month per Yahoo! Finance.
The American Gaming Association estimates that the exchanges have siphoned more than $1.3 billion in would-be tax revenue from states. One of the AGA’s primary spokespeople pin its fight against prediction markets is former New Jersey governor Chris Christie, who championed the PASPA case to the Supreme Court.
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Yahoo Finance has ended its dedicated prediction market integration with Polymarket, cutting short a high-profile partnership less than a year after launch.
The investing and news site announced last week that it halted an arrangement in which it used Polymarket prediction market data for a dedicated hub on the website.
That relationship ended in April, just six months after it started. Yahoo Finance confirmed the end of that agreement to Bloomberg but noted that Polymarket remains an advertising partner.
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Meanwhile, Stake continues to feature on the sleeve of Everton’s kits, despite ceasing operations in the UK in early 2025 amid a Gambling Commission investigation into its advertising.
Other clubs that hold agreements with unlicensed operators include Chelsea (8XBet), Tottenham Hotspur (VSBet) and Nottingham Forest (FUN88).
Entain highlighted data from H2 Gambling Capital that warned black market stakes in the UK are expected to nearly double from £17 billion ($22.7 billion) in 2025 to over £33 billion by 2028.