by I. Nelson Rose | Sep 18, 2026 | Blogs
Polymarket has grown from $1.1 billion in July 2025 to $11 billion, in less than a year. Kalshi is even bigger, at $40 billion. You’ll notice I didn’t say what those billions of dollars are. The futures predictions markets would prefer you call them contracts. Others,...
by I. Nelson Rose | Jul 17, 2026 | Blogs
Prepared for the National Council of Legislators from Gaming States, Summer 2026 Conference, San Diego, California © Copyright July 20, 2026, all rights reserved worldwide. Gambling and the Law® is a registered trademark of Professor I. Nelson Rose,...
by I. Nelson Rose | Jun 30, 2026 | Blogs
I recently joined WGN Radio’s Legal Face-Off to discuss futures prediction markets. My segment begins at 17:15. You can listen...
by I. Nelson Rose | May 15, 2026 | Blogs
New academic paper from Mark Griffiths and Michael Auer shows for the first time who plays online casinos and how much they bet. Looking at 926,086 real money gamblers in six countries, Griffiths and Auer found in the US the top 20% of players account for 95% of the...
by I. Nelson Rose | Mar 27, 2026 | Blogs
On March 23, 2026, Kalshi and Polymarket, by far the largest prediction markets, announced bans on insider trading; even though insider trading is already banned in their Terms and Conditions. Prediction markets have two major problems, which can’t be cured by public...
by I. Nelson Rose | Mar 5, 2026 | Blogs
I was recently quoted in an article published by Danish television network TV 2 Danmark examining the lawsuit between the State of Nevada and prediction market platform Kalshi. The case raises an important legal question: whether contracts allowing people to trade on...
