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Trading ended on Aug 31, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets
Fair chance strips out each venue’s built-in margin (its prices add up to more than 100%), then blends the venues by how much has traded there, so the outcomes add up to 100%. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.
Prices come from our regular polls of each venue, the oldest 126 days ago. Ages are as of when this page was built.
The leading outcome on both venues, with the consensus between them. Hover for exact values.
Each venue’s resting orders for the Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.
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Enter a stake to see where it buys the most after fees, using each venue’s live order book.
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Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.04 × price × (1 − price) per share (politics rate). Fee calculator. Estimates only, not advice.
Final prediction market prices for "SCOTUS strikes down Trump's Birthright Citizenship EO?". Yes last traded at 96%. $141K has traded across 1 outcome on Polymarket. The market closed on Aug 31, 2026.
The Supreme Court is hearing arguments on the merits of Donald Trump’s Executive Order “Protecting the Meaning and Value of American Citizenship” (https://www.whitehouse.gov/presidential-actions/2025/01/protecting-the-meaning-and-value-of-american-citizenship/) which directed that children born in the United States would not automatically receive U.S. citizenship if their parents were in the country unlawfully or on certain temporary visas. This market will resolve to “Yes” if the Supreme Court of the United States rules that Donald Trump’s Executive Order “Protecting the Meaning and Value of American Citizenship” may not be enforced to deny citizenship to children born in the United States, by July 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to “No”. A qualifying ruling must clearly and finally rule that the order, in whole, is unconstitutional or cannot lawfully take effect, or that the order cannot be enforced to deny citizenship to children born in the United States. Procedural rulings that do not clearly resolve whether the order may lawfully be enforced to deny citizenship to children born in the United States will not be sufficient to resolve this market to “Yes”. If a Supreme Court ruling on this case clearly and finally permits the order to deny citizenship to children born in the United States, this market will resolve to “No”. If the Executive Order is withdrawn prior to any qualifying Supreme Court ruling on the order, this market will resolve to “No”. The resolution source for this market will be official information from the Supreme Court of the United States; however, a consensus of credible reporting may also be used.
It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.
A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.
Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.
Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.
Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.