Prediction Markets Shift to $18.5 Billion Sports Trading as Economists Reject the 2008 Vision
Updated
Updated · CNN · Jun 21
Prediction Markets Shift to $18.5 Billion Sports Trading as Economists Reject the 2008 Vision
3 articles · Updated · CNN · Jun 21
Summary
$18.5 billion of Kalshi trading over the past month came from sports-heavy markets and parlays, while sports made up about $2.1 billion—99%—of volume on Polymarket’s new US-facing site.
That tilt marks a sharp break from the 2008 blueprint by 19 economists, who argued prediction markets should focus on economically meaningful events and envisioned modest annual betting caps of about $2,000.
Kalshi and Polymarket say their event contracts are financial trading, not gambling, but critics note the products often look indistinguishable from sportsbook bets and are available in the US to anyone 18 or older.
Economists still credit prediction markets with useful forecasting—from the Iowa market’s 1988 election test to Polymarket’s 2024 Trump call and traders’ reads on inflation and Fed decisions.
The broader fight is over whether that information value outweighs social costs, as addiction experts and some regulators tie the sports-betting boom to rising gambling harms and debt delinquencies.
From economic tool to digital casino: can prediction markets be saved from their own success?
As billions are wagered on 'event contracts,' who decides if it's finance or gambling?
$44 Billion and a Legal Showdown: The Explosive Rise and Regulatory Battle Over U.S. Prediction Markets (2024–2026)
Overview
As of June 2026, the U.S. Commodity Futures Trading Commission (CFTC) has proposed new rules for prediction markets, launching a 45-day public comment period. This comes as prediction markets handle over $13 billion in monthly transactions, but the CFTC’s ability to regulate is under scrutiny, especially after losing its last enforcement attorney in February 2026. Former CFTC and SEC Chairman Gary Gensler has raised concerns about the agency’s lack of resources and experience, noting it did not seek extra staffing or funding from Congress to oversee the surge in sports betting transactions. These challenges highlight growing tensions between rapid market growth and regulatory capacity.