The government of Brazil has announced that prediction market contracts connected to sports, politics, and entertainment will be banned effective May 4, 2026.The...
Kalshi records highest weekly trading volume with $3.91B
Prediction market operator Kalshi reached an all-time high in weekly trading volume with $3.91 billion as of April 28, surpassing competitor Polymarket by around $2 billion.
The number represents the highest weekly volume for a prediction market, with Kalshi’s sports sector generating $3 billion of the platform’s trading volume, which alone is more than Polymarket’s total weekly volume of $1.96 billion. With the latest results, Kalshi now controls 67% of the combined prediction market weekly volume, which is the biggest gap between the platforms so far.
To compare, Kalshi’s weekly volume was at $80.5 million in 2025 and has since increased 42 times.
Sports and exotics, which are combination contracts like parlays, made up 84.9% of Kalshi’s volume, with the exotics sector accounting for $412.5 million, representing 10.6% of total trading. The category is now the second biggest after sports and has overtaken crypto for the second week.
Meanwhile, crypto activity was mostly flat at $330.2 million, with the politics segment generating less than half a per cent of total volume at $16.8 million.
The numbers show the contrast compared to Polymarket, as the platform generated $416 million in crypto and $507.3 million in the politics sector.
Polymarket is in discussions to get $400 million in a new funding round, which would send the prediction markets’ valuation up to $15 billion, compared to the October 2025...
