The Prediction Markets

Who will be the next Supreme Court justice?

Closes
Jan 21, 2029, in 27 months
Traded
$752K
Venues
Kalshi
Prices updated
just now
Share

What the markets expect

Andrew Oldham 15.1%

Next is D. John Sauer at 12.7%. Only Kalshi lists this market, so there is no second price to compare.

Andrew Oldham 15.1%D. John Sauer 12.7%James Ho 10.1%Ted Cruz 8.2%Aileen Cannon 7.9%36 others 46%

Odds by venue

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. Ages are as of when this page was built.

  • Kalshi
Andrew Oldham
15.1%
Kalshi 13%(15.1% fair)polled, 30s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Andrew Oldham
Last price
13%
Fair, margin removed
15.1%
As of
Polled just now
Buy Yes
13¢
Sell Yes
12¢
$100 on Yes pays
$769 (7.69x)
Volume
$43K
Trade this on Kalshi
D. John Sauer
12.7%
Kalshi 11%(12.7% fair)polled, 30s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
D. John Sauer
Last price
11%
Fair, margin removed
12.7%
As of
Polled just now
Buy Yes
13¢
Sell Yes
11¢
$100 on Yes pays
$769 (7.69x)
Volume
$20K
Trade this on Kalshi
James Ho
10.1%
Kalshi 8.7%(10.1% fair)polled, 30s agoBest Yes 8.7¢ on Kalshi, $100 pays $1,149 (11.5x)
Kalshi
Contract
James Ho
Last price
8.7%
Fair, margin removed
10.1%
As of
Polled just now
Buy Yes
8.7¢
Sell Yes
7.9¢
$100 on Yes pays
$1,149 (11.5x)
Volume
$33K
Trade this on Kalshi
Ted Cruz
8.2%
Kalshi 7.1%(8.2% fair)polled, 30s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Ted Cruz
Last price
7.1%
Fair, margin removed
8.2%
As of
Polled just now
Buy Yes
10¢
Sell Yes
7.1¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$46K
Trade this on Kalshi
Aileen Cannon
7.9%
Kalshi 6.8%(7.9% fair)polled, 30s agoBest Yes 7.3¢ on Kalshi, $100 pays $1,370 (13.7x)
Kalshi
Contract
Aileen Cannon
Last price
6.8%
Fair, margin removed
7.9%
As of
Polled just now
Buy Yes
7.3¢
Sell Yes
6.6¢
$100 on Yes pays
$1,370 (13.7x)
Volume
$47K
Trade this on Kalshi
Emil Bove
4.9%
Kalshi 4.2%(4.9% fair)polled, 30s agoBest Yes 4.2¢ on Kalshi, $100 pays $2,381 (23.8x)
Kalshi
Contract
Emil Bove
Last price
4.2%
Fair, margin removed
4.9%
As of
Polled just now
Buy Yes
4.2¢
Sell Yes
4.1¢
$100 on Yes pays
$2,381 (23.8x)
Volume
$18K
Trade this on Kalshi
Michael Park
4.6%
Kalshi 4%(4.6% fair)polled, 30s agoBest Yes 4.6¢ on Kalshi, $100 pays $2,174 (21.7x)
Kalshi
Contract
Michael Park
Last price
4%
Fair, margin removed
4.6%
As of
Polled just now
Buy Yes
4.6¢
Sell Yes
2.8¢
$100 on Yes pays
$2,174 (21.7x)
Volume
$17K
Trade this on Kalshi
Neomi Rao
3.7%
Kalshi 3.2%(3.7% fair)polled, 30s agoBest Yes 3.2¢ on Kalshi, $100 pays $3,125 (31.3x)
Kalshi
Contract
Neomi Rao
Last price
3.2%
Fair, margin removed
3.7%
As of
Polled just now
Buy Yes
3.2¢
Sell Yes
1.9¢
$100 on Yes pays
$3,125 (31.3x)
Volume
$17K
Trade this on Kalshi
Allison Jones Rushing
2.3%
Kalshi 2%polled, 30s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Allison Jones Rushing
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
0.4¢
$100 on Yes pays
$5,000 (50.0x)
Volume
$13K
Trade this on Kalshi
Amul Thapar
2.3%
Kalshi 2%polled, 30s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Amul Thapar
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
1¢
$100 on Yes pays
$5,000 (50.0x)
Volume
$49K
Trade this on Kalshi
Show 31 more outcomes
Mike Lee
2.3%
Kalshi 2%polled, 30s agoBest Yes 2.3¢ on Kalshi, $100 pays $4,348 (43.5x)
Kalshi
Contract
Mike Lee
Last price
2%
As of
Polled just now
Buy Yes
2.3¢
Sell Yes
1.7¢
$100 on Yes pays
$4,348 (43.5x)
Volume
$22K
Trade this on Kalshi
Steven Menashi
2.3%
Kalshi 2%polled, 30s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Steven Menashi
Last price
2%
As of
Polled just now
Buy Yes
2¢
Sell Yes
1¢
$100 on Yes pays
$5,000 (50.0x)
Volume
$7K
Trade this on Kalshi
Lawrence VanDyke
2.2%
Kalshi 1.9%polled, 30s agoBest Yes 1.9¢ on Kalshi, $100 pays $5,263 (52.6x)
Kalshi
Contract
Lawrence VanDyke
Last price
1.9%
As of
Polled just now
Buy Yes
1.9¢
Sell Yes
0.9¢
$100 on Yes pays
$5,263 (52.6x)
Volume
$19K
Trade this on Kalshi
Barbara Lagoa
2.1%
Kalshi 1.8%polled, 30s agoBest Yes 1.8¢ on Kalshi, $100 pays $5,556 (55.6x)
Kalshi
Contract
Barbara Lagoa
Last price
1.8%
As of
Polled just now
Buy Yes
1.8¢
Sell Yes
1.4¢
$100 on Yes pays
$5,556 (55.6x)
Volume
$16K
Trade this on Kalshi
David Stras
2%
Kalshi 1.7%polled, 30s agoBest Yes 1.7¢ on Kalshi, $100 pays $5,882 (58.8x)
Kalshi
Contract
David Stras
Last price
1.7%
As of
Polled just now
Buy Yes
1.7¢
Sell Yes
0.4¢
$100 on Yes pays
$5,882 (58.8x)
Volume
$13K
Trade this on Kalshi
Patrick Bumatay
1.7%
Kalshi 1.5%polled, 30s agoBest Yes 1.5¢ on Kalshi, $100 pays $6,667 (66.7x)
Kalshi
Contract
Patrick Bumatay
Last price
1.5%
As of
Polled just now
Buy Yes
1.5¢
Sell Yes
1.4¢
$100 on Yes pays
$6,667 (66.7x)
Volume
$15K
Trade this on Kalshi
Kenneth Lee
1.5%
Kalshi 1.3%polled, 30s agoBest Yes 1.3¢ on Kalshi, $100 pays $7,692 (76.9x)
Kalshi
Contract
Kenneth Lee
Last price
1.3%
As of
Polled just now
Buy Yes
1.3¢
Sell Yes
0.5¢
$100 on Yes pays
$7,692 (76.9x)
Volume
$14K
Trade this on Kalshi
Kathryn Mizelle
1.4%
Kalshi 1.2%polled, 30s agoBest Yes 1.2¢ on Kalshi, $100 pays $8,333 (83.3x)
Kalshi
Contract
Kathryn Mizelle
Last price
1.2%
As of
Polled just now
Buy Yes
1.2¢
Sell Yes
1¢
$100 on Yes pays
$8,333 (83.3x)
Volume
$17K
Trade this on Kalshi
Anna St. John
1.2%
Kalshi 1%polled, 30s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Anna St. John
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$322
Trade this on Kalshi
Eric Tung
1.2%
Kalshi 1%polled, 30s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Eric Tung
Last price
1%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Volume
$4K
Trade this on Kalshi
Matthew Schwartz
1.2%
Kalshi 1%polled, 30s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Matthew Schwartz
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$5K
Trade this on Kalshi
Ron DeSantis
1.2%
Kalshi 1%polled, 30s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Ron DeSantis
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$19K
Trade this on Kalshi
Yaakov Roth
1.2%
Kalshi 1%polled, 30s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Yaakov Roth
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$333
Trade this on Kalshi
Kevin Newsom
1%
Kalshi 0.9%polled, 30s agoBest Yes 0.9¢ on Kalshi, $100 pays $11,111 (111x)
Kalshi
Contract
Kevin Newsom
Last price
0.9%
As of
Polled just now
Buy Yes
0.9¢
Sell Yes
0.8¢
$100 on Yes pays
$11,111 (111x)
Volume
$17K
Trade this on Kalshi
Gregory G. Katsas
0.9%
Kalshi 0.8%polled, 30s agoBest Yes 0.8¢ on Kalshi, $100 pays $12,500 (125x)
Kalshi
Contract
Gregory G. Katsas
Last price
0.8%
As of
Polled just now
Buy Yes
0.8¢
Sell Yes
0.3¢
$100 on Yes pays
$12,500 (125x)
Volume
$34K
Trade this on Kalshi
Matthew Kacsmaryk
0.5%
Kalshi 0.4%polled, 30s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Matthew Kacsmaryk
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$14K
Trade this on Kalshi
Stephanos Bibas
0.5%
Kalshi 0.4%polled, 30s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Stephanos Bibas
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$24K
Trade this on Kalshi
Stuart Kyle Duncan
0.5%
Kalshi 0.4%polled, 30s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Stuart Kyle Duncan
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$11K
Trade this on Kalshi
Trevor McFadden
0.5%
Kalshi 0.4%polled, 30s agoBest Yes 0.4¢ on Kalshi, $100 pays $25,000 (250x)
Kalshi
Contract
Trevor McFadden
Last price
0.4%
As of
Polled just now
Buy Yes
0.4¢
Sell Yes
0.3¢
$100 on Yes pays
$25,000 (250x)
Volume
$10K
Trade this on Kalshi
Britt Grant
0.4%
Kalshi 0.3%polled, 30s agoBest Yes 0.3¢ on Kalshi, $100 pays $33,333 (333x)
Kalshi
Contract
Britt Grant
Last price
0.3%
As of
Polled just now
Buy Yes
0.3¢
Sell Yes
0.2¢
$100 on Yes pays
$33,333 (333x)
Volume
$18K
Trade this on Kalshi
Mark Martin
0.4%
Kalshi 0.3%polled, 30s agoBest Yes 0.3¢ on Kalshi, $100 pays $33,333 (333x)
Kalshi
Contract
Mark Martin
Last price
0.3%
As of
Polled just now
Buy Yes
0.3¢
Sell Yes
0.2¢
$100 on Yes pays
$33,333 (333x)
Volume
$10K
Trade this on Kalshi
Allison Eid
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Allison Eid
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$10K
Trade this on Kalshi
Clint Bolick
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Clint Bolick
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$14K
Trade this on Kalshi
Evan Young
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Evan Young
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$10K
Trade this on Kalshi
Joan Larsen
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Joan Larsen
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$23K
Trade this on Kalshi
Kate Comerford Todd
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Kate Comerford Todd
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$22K
Trade this on Kalshi
Kevin Brobson
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Kevin Brobson
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$9K
Trade this on Kalshi
Kristen Waggoner
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Kristen Waggoner
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$15K
Trade this on Kalshi
Morse Tan
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Morse Tan
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$24K
Trade this on Kalshi
Patrick Wyrick
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Patrick Wyrick
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$10K
Trade this on Kalshi
Tom Cotton
0.2%
Kalshi 0.2%polled, 30s agoBest Yes 0.2¢ on Kalshi, $100 pays $50,000 (500x)
Kalshi
Contract
Tom Cotton
Last price
0.2%
As of
Polled just now
Buy Yes
0.2¢
Sell Yes
0.1¢
$100 on Yes pays
$50,000 (500x)
Volume
$21K
Trade this on Kalshi

Who resolves this market

Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Library of Congress

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Andrew Oldham
  • D. John Sauer
  • James Ho

Order books

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.

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

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.

About this market

Live prediction market odds for "Who will be the next Supreme Court justice?". Andrew Oldham leads at 15.1%. Next is D. John Sauer at 12.7%. $752K has traded across 41 outcomes on Kalshi. The market is expected to resolve by Jan 21, 2029.

Questions

What does the consensus price mean?

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%.

How is the payout worked out?

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.

Why do the venues show different prices?

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.

Is a price gap an arbitrage?

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.

How fresh are these prices?

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.

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