Intercontinental Exchange, the company that owns the New York Stock Exchange, has invested another $600 million in Polymarket, the world’s largest prediction market platform. The deal brings ICE’s total commitment to roughly $1.6 billion and signals that Wall Street’s biggest exchange operator sees prediction data as a core part of institutional trading infrastructure.
A prediction market is a platform where users trade contracts on the outcome of real-world events, with prices reflecting the crowd’s estimated probability of each outcome.
Key takeaways
- ICE invested $600 million more in Polymarket, raising its total stake to approximately $1.6 billion since October 2025.
- Polymarket’s implied valuation now approaches $20 billion, up from $9 billion six months ago.
- Rival Kalshi separately raised $1 billion at a $22 billion valuation in March 2026, putting the two platforms in a direct funding war.
- Prediction market monthly volumes exceeded $20 billion in January 2026, with nearly 840,000 unique wallets trading monthly by February.
Published: March 27, 2026 UTC
Why ICE keeps doubling down
ICE first committed up to $1 billion to Polymarket in October 2025, the largest single investment ever made in a prediction market company at that time. The relationship has accelerated since then. In February 2026, ICE launched the Polymarket Signals and Sentiment tool, which converts raw Polymarket trading data into structured feeds for institutional terminals.
ICE Chair Jeffrey Sprecher framed the logic plainly. “We’re not a venture firm,” Sprecher said. “If we can bring the underlying technologies into our workflow and increase our sales revenue,” the investment makes sense. The goal is to place Polymarket’s implied probabilities next to bond yields and S&P 500 futures on the same screens that institutional traders already use.
That makes this a data acquisition strategy, not a startup bet. ICE earns revenue by selling terminal access and market data. Adding real-time crowd probabilities for geopolitical events, policy decisions, and economic outcomes gives its data products a new dimension that Bloomberg and Refinitiv terminals do not currently offer.
The prediction market boom by the numbers
Prediction market volumes have gone from a niche category to a $20 billion-plus monthly sector. In January 2026, monthly volumes topped $20 billion for the first time. A single-day record of $425 million was set on February 28. Nearly 840,000 unique wallets were trading monthly by February, a figure that more than tripled in six months.
The mix of activity has also shifted. Geopolitics, macroeconomics, and government policy now drive most trading volume, not crypto prices. In February, Iran-related markets alone attracted $252.7 million across 23 sub-markets. A single contract on whether the U.S. would strike Iran drew $73 million. Fed Chair nomination markets pulled in $125.1 million.
Polymarket is also rolling out trading fees starting March 30, 2026. Crypto contracts will carry a 1.80% peak taker fee, while politics and finance contracts sit at 1.00%, and sports at 0.75%.
Kalshi and the funding arms race
The investment comes as Polymarket and Kalshi race for dominance. Kalshi raised approximately $1 billion at a $22 billion valuation in March 2026. Polymarket is reportedly in discussions for its own fundraise targeting a valuation near $20 billion, up sharply from $9 billion after the October ICE deal.
A new venture firm called 5c(c) Capital, backed by the CEOs of both Polymarket and Kalshi, is raising up to $35 million to invest in 20 prediction market startups over two years. The fund will target infrastructure plays: data tools, liquidity systems, and compliance technology rather than competing exchanges.
Sports partnerships are another front. Polymarket locked in an exclusive deal with MLB reportedly worth up to $300 million, adding to existing partnerships with the NHL, MLS, and UFC.
Regulatory pressure builds
The capital flood has attracted regulatory attention. Seven bills targeting prediction markets have been introduced in Congress in 2026, including the bipartisan “Prediction Markets Are Gambling Act.” Nevada gaming regulators and the Arizona attorney general have filed lawsuits against Kalshi.
On the other side, the CFTC cleared a path in January 2026 when its chairman withdrew proposed restrictive rules and Polymarket received a no-action letter. Both platforms also announced insider trading prevention measures on March 23.
The tension between state-level gambling regulators and federal commodity regulators is likely to shape how prediction markets operate going forward. For ICE, the bet is that federal classification as financial instruments, not gambling, will prevail.
FAQ
How much has ICE invested in Polymarket total?
ICE has committed approximately $1.6 billion to Polymarket. The company first invested up to $1 billion in October 2025 and added another $600 million in March 2026, making it the largest institutional backer of any prediction market platform.
What is Polymarket’s current valuation?
Polymarket’s implied valuation reached approximately $11.6 billion as of January 2026, and the company is reportedly raising a new round targeting close to $20 billion. This compares to a $9 billion post-money valuation after the initial ICE investment in October 2025.
Are prediction markets legal in the United States?
Prediction markets operate in a complex legal space. The CFTC issued Polymarket a no-action letter in January 2026, effectively allowing operations to continue. However, seven congressional bills targeting the sector have been introduced, and some state gaming regulators have challenged platforms like Kalshi in court.
