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Trading ended on Apr 30, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets
Consensus blends each venue’s last price, weighted by how much has traded there. 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 161 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 selected outcome’s 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 "Trump ballroom project unblocked by April 30?". May 31 last traded at 29%. $30K has traded across 1 outcome on Polymarket. The market closed on Apr 30, 2026.
A federal judge recently issued a preliminary injunction to halt construction of Donald Trump’s White House ballroom project (see: https://edition.cnn.com/2026/03/31/politics/judge-rules-that-white-house-ballroom-contstuction-stop). This market will resolve to “Yes” if, at any point between market creation and April 30, 2026, 11:59 PM ET, there are no federal court orders in effect that block construction of the White House ballroom project. Otherwise, this market will resolve to “No”. For the purposes of this market, a “block” refers to any federal court order, including a temporary restraining order, preliminary injunction, or substantially similar order, that prohibits or materially restricts construction of the ballroom project. A court order will be considered “in effect” upon issuance unless it has been formally lifted, vacated, expired, or otherwise invalidated such that it is no longer legally enforceable (e.g., through actions of a higher court). Orders for which enforcement is delayed pending further review (e.g. through a temporary administrative stay, or stay pending appeal) will still be considered “in effect”. If the White House ballroom project receives congressional approval such that all court orders blocking construction are invalidated or rendered unenforceable, this market will resolve to “Yes”. The primary resolution source for this market will be official information from relevant federal courts; 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.