How to hedge with prediction markets: insure against the events that hurt you

Hedging with a prediction market means buying the outcome that would hurt you. If the event happens, the contract pays out and offsets your loss; if it does not, you lose what you paid, like an insurance premium. Prediction markets make this possible for events that no other market prices directly: a Fed decision, an election, a recession, a tariff. Here is how it works, what it costs, and where it goes wrong.

The idea in one example

A small importer expects to lose $50,000 if a new tariff is imposed by year-end. A prediction market prices "Tariff imposed by December 31?" at 20¢.

• To offset a $50,000 loss, the importer buys 50,000 Yes contracts, each paying $1 if the tariff comes. Cost: about $10,000, plus fees.
• If the tariff comes: the contracts pay $50,000, which covers the loss. Net result: about −$10,000 (the premium) instead of −$50,000.
• If it does not: the contracts expire worthless. Net result: −$10,000, the cost of insurance.

The hedge turns an uncertain loss of $0 or $50,000 into a fixed cost of about $10,000. Whether that is a good deal depends on one thing: is 20% a fair price for the risk? If the real chance is 40%, the insurance is cheap. If it is 5%, it is expensive.

Who hedges with event contracts

• Businesses with a clear exposure: an importer to tariffs, an event organiser to the weather, a homebuilder to interest rates.
• Investors with portfolios sensitive to one event, such as a Fed decision, an election result or a recession. A live probability on the event itself can be cheaper and more precise than hedging with stocks or bonds that only partly move with it.
• Professional desks, which increasingly treat event probabilities as a risk input of their own (how hedge funds and quant firms use prediction markets).

Live examples of the events people hedge: Fed rate odds, recession odds and the 2026 midterms.

How to size a hedge

1. Measure the exposure. How much do you lose if the event happens? That sets the number of $1 contracts for a full hedge.
2. Decide how much to cover. A partial hedge, say half the exposure, costs half as much and still cuts the worst case.
3. Price it. Cost = contracts × price + fees. On Kalshi, fees are highest near 50¢, at about 1.75¢ per contract (Covers).
4. Check the order book. A large order can push the price up as it fills. Thin markets make big hedges expensive.

Where hedging goes wrong

• Basis risk. The contract pays on its rules, not on your loss. A market on "two negative quarters of GDP" will not pay if economists declare a recession some other way (event contracts, explained).
• Timing. The market may resolve after your loss arrives, or close before the event you care about.
• Liquidity. In a thin market you may not be able to buy enough, or sell early, without moving the price.
• Overpaying. A hedge bought at an inflated price is expensive insurance. Long shots in particular tend to be overpriced (the favorite-longshot bias).
• Rules, access and taxes. Which markets you can trade, and how gains and losses are taxed, depends on where you live. Check before you rely on a hedge.

The question behind every hedge

Every hedge comes down to the same question as every trade: is the market's price for this risk too high, too low or about right? A 20¢ contract is a bargain if the true chance is 40% and a waste if it is 5%. To answer that, you need your own honest probability, not just the market's (expected value in prediction markets).

Sikt Intelligence is building that second number: an AI superforecaster that reads the news and data that exist today, checks every source, and gives an honest probability next to the market's price. When the two disagree, that gap tells you whether the insurance is cheap or expensive. Leave your email below for early access. Nothing here is financial, investment, tax or legal advice.

Key takeaways

• To hedge, buy the outcome that would hurt you: the payout offsets the loss, and the price is your insurance premium.
• A full hedge needs one $1 contract per dollar of exposure; partial hedges cost less and still cut the worst case.
• Cost = contracts × price + fees, and large orders can move thin markets.
• Watch basis risk: the contract pays on its rules, not on your actual loss.
• A hedge is only good value if the market's price for the risk is fair, which takes your own honest probability to judge.

FAQ

Can you hedge with prediction markets?

Yes. Buying the outcome that would hurt you creates a payout if that event happens, which offsets the loss. Businesses and investors use event contracts on Fed decisions, elections, recessions and other events this way.

How much does a hedge cost?

The number of contracts times the price, plus fees. Covering a $50,000 exposure with contracts at 20¢ costs about $10,000 plus fees, and that is what you lose if the event does not happen.

What is basis risk in a prediction market hedge?

The chance that the contract does not pay when you suffer the loss, because its rules, deadline or resolution source differ from your actual exposure. Read the rules before relying on a hedge.

Is hedging with event contracts legal?

It depends on where you live and which market you use. Kalshi is a US exchange regulated by the Commodity Futures Trading Commission; access and taxes vary by country, so check the rules that apply to you.

Sources

• Covers: Polymarket vs. Kalshi: Comparing Promos, Pricing, Fees & More
• Bürgi, Deng and Whelan (2026): Makers and Takers: The Economics of the Kalshi Prediction Market
• Sikt Intelligence: how hedge funds and quant firms use prediction markets (with sources on institutional use)