The Prediction Markets

Prague mayoral election winner?

Closes
Oct 10, 2027, in 12 months
Traded
$22K
Venues
Kalshi
Prices updated
just now
Share

What the markets expect

Petr Hlaváček 83.9%

Next is Tomáš Portlík at 4.4%. Only Kalshi lists this market, so there is no second price to compare.

Petr Hlaváček 83.9%Tomáš Portlík 4.4%Adam Scheinherr 3.6%Jan Hušbauer 3.6%Jana Komrsková 0.9%4 others 3.6%

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
Petr Hlaváček
83.9%
Kalshi 94%(83.9% fair)polled, 26s agoBest Yes 99¢ on Kalshi, $100 pays $101 (1.01x)
Kalshi
Contract
Petr Hlaváček
Last price
94%
Fair, margin removed
83.9%
As of
Polled just now
Buy Yes
99¢
Sell Yes
94¢
$100 on Yes pays
$101 (1.01x)
Volume
$814
Trade this on Kalshi
Tomáš Portlík
4.4%
Kalshi 5%(4.5% fair)polled, 26s agoBest Yes 5¢ on Kalshi, $100 pays $2,000 (20.0x)
Kalshi
Contract
Tomáš Portlík
Last price
5%
Fair, margin removed
4.5%
As of
Polled just now
Buy Yes
5¢
Sell Yes
—
$100 on Yes pays
$2,000 (20.0x)
Volume
$2K
Trade this on Kalshi
Adam Scheinherr
3.6%
Kalshi 4%polled, 26s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
Adam Scheinherr
Last price
4%
As of
Polled just now
Buy Yes
4¢
Sell Yes
—
$100 on Yes pays
$2,500 (25.0x)
Volume
$488
Trade this on Kalshi
Jan Hušbauer
3.6%
Kalshi 4%polled, 26s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
Jan Hušbauer
Last price
4%
As of
Polled just now
Buy Yes
4¢
Sell Yes
—
$100 on Yes pays
$2,500 (25.0x)
Volume
$11
Trade this on Kalshi
Jana Komrsková
0.9%
Kalshi 1%polled, 26s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Jana Komrsková
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$4K
Trade this on Kalshi
Klára Sovová
0.9%
Kalshi 1%polled, 26s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Klára Sovová
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$4K
Trade this on Kalshi
Milan Urban
0.9%
Kalshi 1%polled, 26s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Milan Urban
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$4K
Trade this on Kalshi
Tereza Nislerová
0.9%
Kalshi 1%polled, 26s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Tereza Nislerová
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
Václav Láska
0.9%
Kalshi 1%polled, 26s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Václav Láska
Last price
1%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$4K
Trade this on Kalshi

Who resolves this market

Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Prague City Assembly

How the odds have moved

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

  • Petr Hlaváček
  • Tomáš Portlík
  • Adam Scheinherr

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.

Kalshi

Open on Kalshi ↗

Top of book

Connecting
Best bid
—
Spread
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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

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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.

About this market

Live prediction market odds for "Prague mayoral election winner?". Petr Hlaváček leads at 83.9%. Next is Tomáš Portlík at 4.4%. $22K has traded across 9 outcomes on Kalshi. The market is expected to resolve by Oct 10, 2027.

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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