How do prediction markets like Polymarket work?

Prediction markets operate on a deceptively simple principle: real money on the line forces people to make accurate predictions. Polymarket, the world's largest one, lets you trade shares on whether something will happen. Will the Fed cut interest rates? Will a specific candidate win an election? Will AI pass a certain benchmark? These become tradeable markets.

Here's the mechanics. Every market launches with a single question that has two opposing outcomes. "Will TikTok be banned in the US before May?" becomes YES and NO shares. These aren't traditional bets where you pick a side and wait. They're financial assets you buy and sell like stocks.

The price tells the story. If YES shares trade at $0.36, the market believes there's a 36% probability of that outcome. NO shares would trade at $0.64 (since they must sum to $1). This isn't some algorithmic calculation—it's pure supply and demand. As new information hits (a debate performance, a policy announcement, breaking news), traders adjust their positions. Smart money buys before information spreads. Casual traders often buy after they've already heard the news. The price eventually settles where buy and sell pressure meet.

You don't have to hold until resolution. This separates prediction markets from traditional wagering. Say you bought TikTok ban shares at $0.20 a month ago. The bill gained momentum, and the price climbed to $0.55. You can sell right now and lock in a $0.35 profit per share without waiting for the actual outcome. You're essentially betting that the price will move, not just that the outcome will be correct.

Settlement happens once the event resolves. A decentralized oracle (a data feed that's tamper-proof) confirms the outcome. If your prediction was right, your shares automatically convert to $1. If wrong, they become worthless. The platform sends your winnings directly to your crypto wallet within hours.

The infrastructure matters. Polymarket runs on Polygon, an Ethereum scaling solution. This keeps fees dirt cheap—often under a penny per trade. Traditional derivatives exchanges charge $1-$5 per trade. On Polygon, you might pay $0.01. That efficiency means you can actually profit from small price movements. You fund your account with USDC, a stablecoin pegged to the US dollar, so you're not gambling with volatile crypto.

Why does this work better than polls? Polls ask people what they think. Prediction markets make people put money behind what they think. If you're wrong, you lose real dollars. This creates brutal honesty. Pollsters might face criticism if they're wrong. Traders lose income. The financial consequences force better analysis. During the 2024 US election, Polymarket predicted the outcome more accurately than traditional polling, which consistently underestimated Trump's chances.

The 2024 election alone saw over $3.7 billion in trading volume on Polymarket. That's not because everyone's gambling. It's because institutions, political campaigns, media compani