Can the Crowd Predict the Future? Understanding Prediction Markets
Have you ever heard someone say, “The stock market seems to know something before everyone else,” or “The betting odds changed overnight”? There's another type of market that's been getting a lot of attention recently, called a prediction market.
At first glance, prediction markets may sound like gambling. And in some ways, they can feel similar. But their purpose is a little different. Instead of betting on a football game or a horse race, people buy and sell contracts based on whether they think a future event will happen.
Some people believe prediction markets can be surprisingly good at estimating the likelihood of future events because they combine the knowledge and opinions of thousands of participants. Others argue they're simply another form of gambling presented in a different way.
Let's take a look at how they work.
What Is a Prediction Market?
A prediction market is a marketplace where people buy and sell contracts based on whether a future event will occur.
For example, you might see questions like:
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Will the Federal Reserve lower interest rates this year?
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Will a particular movie win Best Picture?
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Will a certain company release a new product before December?
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Will it rain in New York on July 4?
Instead of simply answering “yes” or “no,” participants buy contracts representing the outcome they believe is most likely.
The price of each contract reflects the market's current expectations. For example, if a “Yes” contract is trading at 70 cents, the market implies about a 70% chance the event will occur.
As new information becomes available, prices rise and fall to reflect changing expectations.
Why Do People Think They're Useful?
Prediction markets are often described as an example of the “wisdom of the crowd.”
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The idea is simple.
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One expert may overlook something important.
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Thousands of people, each bringing different pieces of information and perspectives, may collectively produce a surprisingly good estimate.
Researchers have found that prediction markets have often performed as well as—or in some cases better than—traditional opinion polls for elections and certain other events. However, their accuracy varies depending on what is being predicted and how many people are actively participating.
That doesn't mean the market predicts the future.
It simply reflects what participants currently believe is most likely based on the information available at that moment.
Meet Two Popular Prediction Markets
Two names you'll hear frequently are Polymarket and Kalshi.
Although they appear similar, they operate quite differently.
Polymarket
Polymarket is built around cryptocurrency. Users typically trade using a digital currency called USD Coin (USDC), a cryptocurrency designed to maintain a value close to one U.S. dollar.
Polymarket offers hundreds of markets covering politics, economics, sports, technology, entertainment, and world events. Because it uses cryptocurrency, it has attracted participants from many countries.
Kalshi
Kalshi takes a different approach.
It operates as a federally regulated prediction market in the United States and allows users to fund their accounts with ordinary U.S. dollars rather than cryptocurrency.
Kalshi is overseen by the Commodity Futures Trading Commission (CFTC), the federal agency responsible for regulating certain financial markets.
Like Polymarket, Kalshi offers markets covering economics, weather, politics, sports, entertainment, and other real-world events. Because it operates under U.S. regulations, the types of markets it offers may differ from those found on Polymarket.
Are These Just Gambling?
That's where opinions differ.
Supporters say prediction markets are valuable forecasting tools because they encourage people to put real money behind their beliefs rather than simply answering a survey.
Critics argue that risking money on future events looks and feels very much like gambling, especially when markets involve sports, entertainment, or political events.
As prediction markets continue to grow, regulators and policymakers are still debating where to draw the line between financial forecasting and gambling.
A Simple Example
Imagine there's a prediction market asking:
“Will the first snowfall in Chicago occur before Thanksgiving?”
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If many weather enthusiasts believe an early cold front is coming, more people may buy “Yes” contracts.
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That increased demand pushes the price higher.
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If updated forecasts indicate a warmer autumn, traders may begin selling those contracts, causing prices to fall.
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Notice that nobody knows the answer in advance.
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The market is simply adjusting as new information becomes available.
Even if the market estimates an 80% chance of something happening, that still leaves a 20% chance it won't. Prediction markets estimate likelihood—they don't guarantee outcomes.
Why Are Prediction Markets Becoming More Popular?
Several factors have contributed to their growing popularity.
People enjoy following current events in real time.
Technology makes it easy to participate using a smartphone or computer.
Social media also spreads interesting prediction questions very quickly.
Today, you'll sometimes hear television commentators or read news articles that mention prediction market odds alongside traditional opinion polls, especially during elections or major economic announcements.
Why It Matters
Even if you never open an account on Polymarket or Kalshi, you're likely to hear prediction markets mentioned more often in news reports.
When a commentator says, “Prediction markets now estimate a 65% chance of…” they're referring to the collective expectations of people buying and selling contracts—not a crystal ball.
It's helpful to remember that these markets measure expectations, not certainty.
Like weather forecasts, they're educated estimates that can change as new information becomes available.
The Bottom Line
Prediction markets offer an interesting glimpse into what large groups of people believe is likely to happen.
Sometimes those estimates turn out to be remarkably accurate. Other times, unexpected events prove the market wrong.
They're best viewed as one source of information—not the final answer.
Whether prediction markets become a permanent part of how we understand future events remains to be seen. But they are already changing how many people think about forecasting the future.
Frequently Asked Questions
Are prediction markets the same as gambling?
They share similarities because participants can win or lose money depending on the outcomes of future events. However, supporters view prediction markets as forecasting tools that help estimate the likelihood of real-world events, while critics see them as another form of gambling. The debate continues.
Do I have to use cryptocurrency to participate?
Not always. Polymarket primarily uses cryptocurrency, while Kalshi allows users to deposit and withdraw ordinary U.S. dollars through traditional banking methods.
Does a prediction market know what will happen?
No. A prediction market simply reflects what participants currently believe is most likely. Like a weather forecast, it's an estimate based on the information available at the time, and unexpected events can always change the outcome.
