The Prediction Markets

When will Marco Rubio announce his presidential candidacy?

Closes
Oct 1, 2027, in 11 months
Traded
$3K
Venues
Kalshi
Prices updated
just now
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What the markets expect

Before Oct 1, 2027 51%

Next is Before Jul 1, 2027 at 47%. Only Kalshi lists this market, so there is no second price to compare.

Odds by venue

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. Ages are as of when this page was built.

  • Kalshi
Before Oct 1, 2027
51%
Kalshi 51%polled, 39s agoBest Yes 51¢ on Kalshi, $100 pays $196 (1.96x)
Kalshi
Contract
Before Oct 1, 2027
Last price
51%
As of
Polled just now
Buy Yes
51¢
Sell Yes
45¢
$100 on Yes pays
$196 (1.96x)
Volume
$717
Trade this on Kalshi
Before Jul 1, 2027
47%
Kalshi 47%polled, 39s agoBest Yes 47¢ on Kalshi, $100 pays $213 (2.13x)
Kalshi
Contract
Before Jul 1, 2027
Last price
47%
As of
Polled just now
Buy Yes
47¢
Sell Yes
38¢
$100 on Yes pays
$213 (2.13x)
Volume
$621
Trade this on Kalshi
Before Jun 1, 2027
31.5%
Kalshi 31.5%polled, 39s agoBest Yes 36¢ on Kalshi, $100 pays $278 (2.78x)
Kalshi
Contract
Before Jun 1, 2027
Last price
31.5%
As of
Polled just now
Buy Yes
36¢
Sell Yes
27¢
$100 on Yes pays
$278 (2.78x)
Trade this on Kalshi
Before May 1, 2027
16.5%
Kalshi 16.5%polled, 39s agoBest Yes 21¢ on Kalshi, $100 pays $476 (4.76x)
Kalshi
Contract
Before May 1, 2027
Last price
16.5%
As of
Polled just now
Buy Yes
21¢
Sell Yes
12¢
$100 on Yes pays
$476 (4.76x)
Trade this on Kalshi
Before Apr 1, 2027
12%
Kalshi 12%polled, 39s agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
Before Apr 1, 2027
Last price
12%
As of
Polled just now
Buy Yes
12¢
Sell Yes
5¢
$100 on Yes pays
$833 (8.33x)
Volume
$824
Trade this on Kalshi
Before Jan 1, 2027
11%
Kalshi 11%polled, 39s agoBest Yes 11¢ on Kalshi, $100 pays $909 (9.09x)
Kalshi
Contract
Before Jan 1, 2027
Last price
11%
As of
Polled just now
Buy Yes
11¢
Sell Yes
2¢
$100 on Yes pays
$909 (9.09x)
Volume
$850
Trade this on Kalshi

Who resolves this market

Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: ABC, Fox News, MSNBC

How the odds have moved

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

  • Before Oct 1, 2027
  • Before Jul 1, 2027
  • Before Jun 1, 2027

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

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Best ask
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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.

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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 0.05 × price × (1 − price) per share (other / general rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "When will Marco Rubio announce his presidential candidacy?". Before Oct 1, 2027 leads at 51%. Next is Before Jul 1, 2027 at 47%. $3K has traded across 6 outcomes on Kalshi. The market is expected to resolve by Oct 1, 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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