Prediction markets let you trade the stock market as a single outcome rather than picking individual shares. With major indexes reported continuously and settled on official closing levels, index contracts are clean and datable. Here is what you can trade and how it compares with buying a fund or an option.
What you can trade
- Index levels — whether the S&P 500 or Nasdaq is above or below a stated level by a given date.
- Daily direction — whether the market closes up or down on the day.
- Records and milestones — whether a new all-time high is set, or a round-number level is reached.
- Year-end targets — where an index finishes the year, often traded as ranges.
Where to trade stock-index markets
Any of the regulated platforms below is a solid home for this category; our full ranking is in the linked roundup.
Kalshi Editor's pick
Regulated markets on major index levels and daily moves, funded in dollars and settled on the closing print.
Polymarket Crypto
Liquid markets on index milestones and records, settled on-chain.
Robinhood Low fees
Trade index event contracts alongside the stocks and funds you already hold, in one app.
How index markets settle
Contracts resolve on the official closing level of the named index at the stated date, paying $1 or $0. The details to check are the exact index and the settlement time or session. These differ from an index fund or option: an event contract pays a fixed amount on a yes/no outcome, whereas a fund gives continuous exposure and an option’s value scales with the move — see prediction markets vs options and prediction markets vs the stock market.
Tips for trading index markets
- Daily markets are noisy — single-session direction is close to a coin flip absent a clear catalyst.
- Macro drives levels — rate decisions, inflation prints and earnings season move the index; see the Fed-rate markets guide.
- Know the close — the exact settlement level and time decide contracts near a threshold.
- A price is a probability — an index at 70% to hold a level still fails three times in ten; size accordingly.
Availability varies by US state and is evolving — see are prediction markets legal? These are real-money contracts with real risk; trade responsibly and only stake what you can afford to lose.
Related market guides
Trade adjacent categories with the same exchange account:
Frequently asked questions
Where can I trade stock market index prediction markets?
Kalshi offers regulated markets on major index levels and daily moves; Polymarket lists index milestone markets; and Robinhood lets you trade them alongside your holdings. See our best-platform ranking.
What index markets can I trade?
Whether the S&P 500 or Nasdaq is above or below a level, daily up/down direction, new all-time highs and round-number milestones, and year-end target ranges.
How is this different from buying an index fund?
An index event contract pays a fixed $1 or $0 on a specific yes/no outcome, whereas a fund gives continuous exposure to the index and an option’s value scales with the move. They are complementary tools.