When the Commodity Futures Trading Commission (CFTC) legalized prediction markets in November 2021, one thing was for sure: traditional sports betting would get a run for its money. Fast forward to the present, and major providers like Kalshi and PolyMarket are offering either a limited or full-slate of prediction markets in the vast majority of US states.
This fast-moving sports betting alternative took traditional sportsbooks by surprise for multiple reasons:
- Prediction markets became available for the same sporting events sportsbooks offered – ostensibly making them competitors – despite the mechanical differences in how the markets are modeled, priced and booked.
- Providers like Kalshi and Polymarket created markets for outcomes sportsbooks couldn’t touch, like the results of state and national elections and certain entertainment events.
- Market providers are available in the vast majority of US states while sports betting is still partially or fully off-limits in several states, most critically California and Texas
| Bonus |
|---|
Key Differences Between Sports Betting and Prediction Markets
If you have been betting on sports for years and are thinking about trying prediction markets, there are a few things you need to know: they are not sportsbooks, they’re actually closer to financial exchanges. That distinction matters more than people think.
You Are Buying a Contract, Not Placing a Bet
Every prediction market trade is a contract priced between $0 and $1. A contract on the Baltimore Ravens to win Super Bowl LXI priced at $0.28 means the market thinks there is a 28 percent chance that happens.
- If it does, your contract settles at $1. You collect $1-$0.28 = $0.72 in profit.
- If not, it settles at $0. You lose your $0.28.
There are no point spreads, no juice, and no odds on any particular line. Just probability expressed as a price.
Kalshi and Polymarket Are the Two Platforms That Matter
Kalshi is CFTC-regulated and operates under federal oversight rather than state gambling law, which means it is accessible to US residents in states where traditional sports betting is still illegal, like California and Texas (as of August 2026).
Polymarket runs on the Polygon blockchain and settles in USDC, which makes it crypto-native and globally accessible. Both are legitimate. Kalshi has deeper liquidity on mainstream US sports. Polymarket has broader global coverage and tighter spreads on high-volume markets due to its sheer size.
Sports Just Passed Politics as the Top Category
For most of prediction markets’ history, politics drove the majority of volume. The 2024 election put these platforms on the map when Polymarket data outperformed traditional polling on the final result.
In 2026, sports overtook politics as the leading category on both Kalshi and Polymarket. The World Cup Winner market on Polymarket crossed $3 billion in total volume. That is not a novelty number. That is an enormous liquid market.
| Bonus |
|---|
You Can Exit Before the Event Settles
This is the part that separates prediction markets from sportsbooks in a meaningful way.
If you buy a Baltimore Ravens contract at $0.28 and they make the AFC conference championship, that contract might be trading at $0.55. You can sell it right there and pocket the difference without waiting for the Super Bowl to be played. Liquidity varies by market and platform, but on the major contracts, exits are generally available. You are trading, not waiting.
The Bid-Ask Spread Is Your Real Cost
There is no traditional vig on a prediction market, but that does not mean it is free to trade. The spread between what buyers are willing to pay and what sellers are asking is where the cost lives.
On a high-volume World Cup match, that spread might be a cent or two. On a lower-volume college football contract, it can be much wider. Check the depth of book before entering any position on a thinner market, because the spread on entry and exit can eat into returns fast.
Traditional Odds Still Matter, Even Here
Prediction market prices and traditional sportsbook odds are measuring the same thing: probability.
A Jacksonville Jaguars contract trading at $0.65 on Kalshi implies roughly -186 moneyline odds. If your sportsbook is posting -160 on the same game, one of those markets has mispriced the outcome. Experienced bettors use both to cross-reference.
Checking how prediction market pricing works alongside odds is one of the more useful habits to build early, because the gaps between the two markets are often where the value hides.
New Platforms Are Entering Fast
Kalshi and Polymarket are not the only games in town anymore:
- Robinhood Sports launched event contracts with zero commission directly inside the Robinhood app.
- Novig focuses exclusively on sports without political and cultural noise.
- Crypto.com partnered with Underdog on a CFTC-regulated sports prediction product.
The competition is pushing fees down and bringing new audiences in faster than most people realize.
Kalshi Alone Has 490 World Cup Markets
If you thought prediction markets were thin on sports coverage, the 2026 World Cup put that idea to rest.
Kalshi listed over 490 markets in the tournament. Polymarket had European and international football as its highest-volume sports category by April 2026.
You can trade on match winners, tournament winners, top scorer markets, group stage advancement, and dozens of in-game events. The depth is there. The question is whether you want to use it.
CFTC Regulation Changes the Legal Picture
Traditional sportsbooks operate under state gambling law, which is why legal sports betting is still unavailable in roughly a dozen US states.
Kalshi and other CFTC-regulated prediction markets operate under federal commodities law, which means they are accessible in states where the sportsbook map has gaps. This is not a loophole. It is a different regulatory category.
But it does mean that sports bettors in states like California or Texas who cannot access a traditional sportsbook legally have options they may not know exist.
Start Small and Learn the Mechanics Before Scaling
The contract pricing, liquidity dynamics, settlement process, and exit mechanics are all different enough from traditional sports betting that a learning period is worth it. A few small trades on high-volume markets where you already have a strong opinion is the sensible way to get familiar before putting real money into thinner contracts where mispricing is harder to identify.
Refer to each site’s fees page to determine how best to maximize your trades.