The Prediction Markets

SSC Napoli vs AS Roma: 1st Half Correct Score

Starts in 57 minKickoff
Traded
$57K
Venues
Polymarket, Kalshi
Prices updated
just now
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What the markets expect

AS Roma 35.5%

Next is SSC Napoli at 35.5%. The venues list this event, but none of their outcomes are matched yet, so prices are shown separately.

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.

  • Polymarket
  • Kalshi
AS Roma
35.5%
Polymarket 35.5%polled, 60s agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
AS Roma
Last price
35.5%
As of
Polled just now
Buy Yes
36¢
Sell Yes
35¢
$100 on Yes pays
$278 (2.78x)
Volume
$23K
Trade this on Polymarket
SSC Napoli
35.5%
Polymarket 35.5%polled, 60s agoBest Yes 36¢ on Polymarket, $100 pays $278 (2.78x)
Polymarket
Contract
SSC Napoli
Last price
35.5%
As of
Polled just now
Buy Yes
36¢
Sell Yes
35¢
$100 on Yes pays
$278 (2.78x)
Volume
$17K
Trade this on Polymarket
SSC Napoli
29.5%
Polymarket 29.5%polled, 60s agoBest Yes 30¢ on Polymarket, $100 pays $333 (3.33x)
Polymarket
Contract
Draw (SSC Napoli vs. AS Roma)
Last price
29.5%
As of
Polled just now
Buy Yes
30¢
Sell Yes
29¢
$100 on Yes pays
$333 (3.33x)
Volume
$602
Trade this on Polymarket
Draw 1H 0-0
29%
Kalshi 29%polled, 60s agoBest Yes 31¢ on Kalshi, $100 pays $323 (3.23x)
Kalshi
Contract
Draw 1H 0-0
Last price
29%
As of
Polled just now
Buy Yes
31¢
Sell Yes
27¢
$100 on Yes pays
$323 (3.23x)
Trade this on Kalshi
SSC Napoli
26.7%
Polymarket 26.7%polled, 60s agoBest Yes 53.3¢ on Polymarket, $100 pays $188 (1.88x)
Polymarket
Contract
SSC Napoli 5 - 4 AS Roma
Last price
26.7%
As of
Polled just now
Buy Yes
53.3¢
Sell Yes
—
$100 on Yes pays
$188 (1.88x)
Volume
$10
Trade this on Polymarket
SSC Napoli
25.7%
Polymarket 25.7%polled, 60s agoBest Yes 51.3¢ on Polymarket, $100 pays $195 (1.95x)
Polymarket
Contract
SSC Napoli 3 - 5 AS Roma
Last price
25.7%
As of
Polled just now
Buy Yes
51.3¢
Sell Yes
—
$100 on Yes pays
$195 (1.95x)
Trade this on Polymarket
AS Roma wins 1H 1-0
18%
Kalshi 18%polled, 60s agoBest Yes 19¢ on Kalshi, $100 pays $526 (5.26x)
Kalshi
Contract
AS Roma wins 1H 1-0
Last price
18%
As of
Polled just now
Buy Yes
19¢
Sell Yes
17¢
$100 on Yes pays
$526 (5.26x)
Trade this on Kalshi
SSC Napoli
17%
Kalshi 17%polled, 60s agoBest Yes 18¢ on Kalshi, $100 pays $556 (5.56x)
Kalshi
Contract
SSC Napoli wins 1H 1-0
Last price
17%
As of
Polled just now
Buy Yes
18¢
Sell Yes
16¢
$100 on Yes pays
$556 (5.56x)
Trade this on Kalshi
SSC Napoli
13.5%
Polymarket 13.5%polled, 60s agoBest Yes 14¢ on Polymarket, $100 pays $714 (7.14x)
Polymarket
Contract
SSC Napoli 1 - 1 AS Roma
Last price
13.5%
As of
Polled just now
Buy Yes
14¢
Sell Yes
13¢
$100 on Yes pays
$714 (7.14x)
Volume
$706
Trade this on Polymarket
Draw 1H 1-1
11%
Kalshi 11%polled, 60s agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
Draw 1H 1-1
Last price
11%
As of
Polled just now
Buy Yes
12¢
Sell Yes
11¢
$100 on Yes pays
$833 (8.33x)
Volume
$666
Trade this on Kalshi
Show 45 more outcomes
SSC Napoli
9.6%
Polymarket 9.6%polled, 60s agoBest Yes 19.1¢ on Polymarket, $100 pays $524 (5.24x)
Polymarket
Contract
SSC Napoli 5 - 3 AS Roma
Last price
9.6%
As of
Polled just now
Buy Yes
19.1¢
Sell Yes
—
$100 on Yes pays
$524 (5.24x)
Trade this on Polymarket
SSC Napoli
9.5%
Polymarket 9.5%polled, 60s agoBest Yes 18.9¢ on Polymarket, $100 pays $529 (5.29x)
Polymarket
Contract
SSC Napoli 4 - 5 AS Roma
Last price
9.5%
As of
Polled just now
Buy Yes
18.9¢
Sell Yes
—
$100 on Yes pays
$529 (5.29x)
Volume
$10
Trade this on Polymarket
SSC Napoli
8.5%
Polymarket 8.5%polled, 60s agoBest Yes 9¢ on Polymarket, $100 pays $1,111 (11.1x)
Polymarket
Contract
SSC Napoli 0 - 1 AS Roma
Last price
8.5%
As of
Polled just now
Buy Yes
9¢
Sell Yes
8¢
$100 on Yes pays
$1,111 (11.1x)
Volume
$10
Trade this on Polymarket
SSC Napoli
8.5%
Polymarket 8.5%polled, 60s agoBest Yes 9¢ on Polymarket, $100 pays $1,111 (11.1x)
Polymarket
Contract
SSC Napoli 2 - 1 AS Roma
Last price
8.5%
As of
Polled just now
Buy Yes
9¢
Sell Yes
8¢
$100 on Yes pays
$1,111 (11.1x)
Volume
$56
Trade this on Polymarket
SSC Napoli
8.5%
Polymarket 8.5%polled, 60s agoBest Yes 9¢ on Polymarket, $100 pays $1,111 (11.1x)
Polymarket
Contract
SSC Napoli 1 - 2 AS Roma
Last price
8.5%
As of
Polled just now
Buy Yes
9¢
Sell Yes
8¢
$100 on Yes pays
$1,111 (11.1x)
Volume
$222
Trade this on Polymarket
SSC Napoli
7.5%
Polymarket 7.5%polled, 60s agoBest Yes 8¢ on Polymarket, $100 pays $1,250 (12.5x)
Polymarket
Contract
SSC Napoli 1 - 0 AS Roma
Last price
7.5%
As of
Polled just now
Buy Yes
8¢
Sell Yes
7¢
$100 on Yes pays
$1,250 (12.5x)
Volume
$22
Trade this on Polymarket
SSC Napoli
6.5%
Polymarket 6.5%polled, 60s agoBest Yes 7¢ on Polymarket, $100 pays $1,429 (14.3x)
Polymarket
Contract
SSC Napoli 2 - 2 AS Roma
Last price
6.5%
As of
Polled just now
Buy Yes
7¢
Sell Yes
6¢
$100 on Yes pays
$1,429 (14.3x)
Volume
$233
Trade this on Polymarket
SSC Napoli
6.5%
Polymarket 6.5%polled, 60s agoBest Yes 7¢ on Polymarket, $100 pays $1,429 (14.3x)
Polymarket
Contract
SSC Napoli 0 - 0 AS Roma
Last price
6.5%
As of
Polled just now
Buy Yes
7¢
Sell Yes
6¢
$100 on Yes pays
$1,429 (14.3x)
Trade this on Polymarket
Any Other Score
6.1%
Polymarket 6.1%polled, 60s agoBest Yes 12¢ on Polymarket, $100 pays $833 (8.33x)
Polymarket
Contract
Any Other Score
Last price
6.1%
As of
Polled just now
Buy Yes
12¢
Sell Yes
0.1¢
$100 on Yes pays
$833 (8.33x)
Volume
$13K
Trade this on Polymarket
SSC Napoli
6%
Kalshi 6%polled, 60s agoBest Yes 6¢ on Kalshi, $100 pays $1,667 (16.7x)
Kalshi
Contract
SSC Napoli wins 1H 2-0
Last price
6%
As of
Polled just now
Buy Yes
6¢
Sell Yes
—
$100 on Yes pays
$1,667 (16.7x)
Trade this on Kalshi
SSC Napoli
5.5%
Polymarket 5.5%polled, 60s agoBest Yes 6¢ on Polymarket, $100 pays $1,667 (16.7x)
Polymarket
Contract
SSC Napoli 0 - 2 AS Roma
Last price
5.5%
As of
Polled just now
Buy Yes
6¢
Sell Yes
5¢
$100 on Yes pays
$1,667 (16.7x)
Trade this on Polymarket
SSC Napoli
5.4%
Polymarket 5.4%polled, 60s agoBest Yes 5.6¢ on Polymarket, $100 pays $1,786 (17.9x)
Polymarket
Contract
SSC Napoli 2 - 0 AS Roma
Last price
5.4%
As of
Polled just now
Buy Yes
5.6¢
Sell Yes
5.1¢
$100 on Yes pays
$1,786 (17.9x)
Volume
$50
Trade this on Polymarket
SSC Napoli
5%
Polymarket 5%polled, 60s agoBest Yes 10¢ on Polymarket, $100 pays $1,000 (10.0x)
Polymarket
Contract
SSC Napoli 5 - 5 AS Roma
Last price
5%
As of
Polled just now
Buy Yes
10¢
Sell Yes
—
$100 on Yes pays
$1,000 (10.0x)
Volume
$10
Trade this on Polymarket
SSC Napoli
3.8%
Polymarket 3.8%polled, 60s agoBest Yes 3.9¢ on Polymarket, $100 pays $2,564 (25.6x)
Polymarket
Contract
SSC Napoli 1 - 3 AS Roma
Last price
3.8%
As of
Polled just now
Buy Yes
3.9¢
Sell Yes
3.6¢
$100 on Yes pays
$2,564 (25.6x)
Trade this on Polymarket
SSC Napoli
3.7%
Polymarket 3.7%polled, 60s agoBest Yes 3.8¢ on Polymarket, $100 pays $2,632 (26.3x)
Polymarket
Contract
SSC Napoli 3 - 1 AS Roma
Last price
3.7%
As of
Polled just now
Buy Yes
3.8¢
Sell Yes
3.5¢
$100 on Yes pays
$2,632 (26.3x)
Trade this on Polymarket
AS Roma wins 1H 2-0
3%
Kalshi 3%polled, 60s agoBest Yes 6¢ on Kalshi, $100 pays $1,667 (16.7x)
Kalshi
Contract
AS Roma wins 1H 2-0
Last price
3%
As of
Polled just now
Buy Yes
6¢
Sell Yes
—
$100 on Yes pays
$1,667 (16.7x)
Trade this on Kalshi
AS Roma wins 1H 2-1
3%
Kalshi 3%polled, 60s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
AS Roma wins 1H 2-1
Last price
3%
As of
Polled just now
Buy Yes
4¢
Sell Yes
2¢
$100 on Yes pays
$2,500 (25.0x)
Volume
$681
Trade this on Kalshi
SSC Napoli
2.9%
Polymarket 2.9%polled, 60s agoBest Yes 3.1¢ on Polymarket, $100 pays $3,226 (32.3x)
Polymarket
Contract
SSC Napoli 2 - 3 AS Roma
Last price
2.9%
As of
Polled just now
Buy Yes
3.1¢
Sell Yes
2.7¢
$100 on Yes pays
$3,226 (32.3x)
Volume
$313
Trade this on Polymarket
SSC Napoli
2.9%
Polymarket 2.9%polled, 60s agoBest Yes 3¢ on Polymarket, $100 pays $3,333 (33.3x)
Polymarket
Contract
SSC Napoli 3 - 2 AS Roma
Last price
2.9%
As of
Polled just now
Buy Yes
3¢
Sell Yes
2.7¢
$100 on Yes pays
$3,333 (33.3x)
Trade this on Polymarket
SSC Napoli
2.6%
Polymarket 2.6%polled, 60s agoBest Yes 5.1¢ on Polymarket, $100 pays $1,961 (19.6x)
Polymarket
Contract
SSC Napoli 4 - 4 AS Roma
Last price
2.6%
As of
Polled just now
Buy Yes
5.1¢
Sell Yes
—
$100 on Yes pays
$1,961 (19.6x)
Volume
$5
Trade this on Polymarket
SSC Napoli
2.6%
Polymarket 2.6%polled, 60s agoBest Yes 2.8¢ on Polymarket, $100 pays $3,571 (35.7x)
Polymarket
Contract
SSC Napoli 3 - 0 AS Roma
Last price
2.6%
As of
Polled just now
Buy Yes
2.8¢
Sell Yes
2.3¢
$100 on Yes pays
$3,571 (35.7x)
Trade this on Polymarket
SSC Napoli
2.6%
Polymarket 2.6%polled, 60s agoBest Yes 2.7¢ on Polymarket, $100 pays $3,704 (37.0x)
Polymarket
Contract
SSC Napoli 0 - 3 AS Roma
Last price
2.6%
As of
Polled just now
Buy Yes
2.7¢
Sell Yes
2.4¢
$100 on Yes pays
$3,704 (37.0x)
Volume
$89
Trade this on Polymarket
SSC Napoli
2%
Kalshi 2%polled, 60s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
SSC Napoli wins 1H 2-1
Last price
2%
As of
Polled just now
Buy Yes
4¢
Sell Yes
—
$100 on Yes pays
$2,500 (25.0x)
Trade this on Kalshi
SSC Napoli
1.5%
Polymarket 1.5%polled, 60s agoBest Yes 1.7¢ on Polymarket, $100 pays $5,882 (58.8x)
Polymarket
Contract
SSC Napoli 3 - 3 AS Roma
Last price
1.5%
As of
Polled just now
Buy Yes
1.7¢
Sell Yes
1.3¢
$100 on Yes pays
$5,882 (58.8x)
Volume
$508
Trade this on Polymarket
SSC Napoli
1.3%
Polymarket 1.3%polled, 60s agoBest Yes 1.5¢ on Polymarket, $100 pays $6,667 (66.7x)
Polymarket
Contract
SSC Napoli 1 - 4 AS Roma
Last price
1.3%
As of
Polled just now
Buy Yes
1.5¢
Sell Yes
1¢
$100 on Yes pays
$6,667 (66.7x)
Trade this on Polymarket
SSC Napoli
1.2%
Polymarket 1.2%polled, 60s agoBest Yes 1.4¢ on Polymarket, $100 pays $7,143 (71.4x)
Polymarket
Contract
SSC Napoli 4 - 1 AS Roma
Last price
1.2%
As of
Polled just now
Buy Yes
1.4¢
Sell Yes
1¢
$100 on Yes pays
$7,143 (71.4x)
Trade this on Polymarket
AS Roma wins 1H 3-0
1%
Kalshi 1%polled, 60s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
AS Roma wins 1H 3-0
Last price
1%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Trade this on Kalshi
AS Roma wins 1H 3-1
1%
Kalshi 1%polled, 60s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
AS Roma wins 1H 3-1
Last price
1%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Trade this on Kalshi
Draw 1H 2-2
1%
Kalshi 1%polled, 60s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
Draw 1H 2-2
Last price
1%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Trade this on Kalshi
SSC Napoli
1%
Kalshi 1%polled, 60s agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
SSC Napoli wins 1H 3-0
Last price
1%
As of
Polled just now
Buy Yes
2¢
Sell Yes
—
$100 on Yes pays
$5,000 (50.0x)
Trade this on Kalshi
SSC Napoli
1%
Polymarket 1%polled, 60s agoBest Yes 1.9¢ on Polymarket, $100 pays $5,263 (52.6x)
Polymarket
Contract
SSC Napoli 5 - 2 AS Roma
Last price
1%
As of
Polled just now
Buy Yes
1.9¢
Sell Yes
—
$100 on Yes pays
$5,263 (52.6x)
Volume
$5
Trade this on Polymarket
SSC Napoli
0.9%
Polymarket 0.9%polled, 60s agoBest Yes 1.1¢ on Polymarket, $100 pays $9,091 (90.9x)
Polymarket
Contract
SSC Napoli 2 - 4 AS Roma
Last price
0.9%
As of
Polled just now
Buy Yes
1.1¢
Sell Yes
0.7¢
$100 on Yes pays
$9,091 (90.9x)
Trade this on Polymarket
SSC Napoli
0.9%
Polymarket 0.9%polled, 60s agoBest Yes 1¢ on Polymarket, $100 pays $10,000 (100x)
Polymarket
Contract
SSC Napoli 4 - 2 AS Roma
Last price
0.9%
As of
Polled just now
Buy Yes
1¢
Sell Yes
0.7¢
$100 on Yes pays
$10,000 (100x)
Trade this on Polymarket
SSC Napoli
0.9%
Polymarket 0.9%polled, 60s agoBest Yes 1¢ on Polymarket, $100 pays $10,000 (100x)
Polymarket
Contract
SSC Napoli 4 - 0 AS Roma
Last price
0.9%
As of
Polled just now
Buy Yes
1¢
Sell Yes
0.7¢
$100 on Yes pays
$10,000 (100x)
Trade this on Polymarket
SSC Napoli
0.9%
Polymarket 0.9%polled, 60s agoBest Yes 1¢ on Polymarket, $100 pays $10,000 (100x)
Polymarket
Contract
SSC Napoli 0 - 4 AS Roma
Last price
0.9%
As of
Polled just now
Buy Yes
1¢
Sell Yes
0.7¢
$100 on Yes pays
$10,000 (100x)
Volume
$200
Trade this on Polymarket
SSC Napoli
0.6%
Polymarket 0.6%polled, 60s agoBest Yes 0.9¢ on Polymarket, $100 pays $11,111 (111x)
Polymarket
Contract
SSC Napoli 1 - 5 AS Roma
Last price
0.6%
As of
Polled just now
Buy Yes
0.9¢
Sell Yes
0.3¢
$100 on Yes pays
$11,111 (111x)
Trade this on Polymarket
SSC Napoli
0.6%
Polymarket 0.6%polled, 60s agoBest Yes 0.9¢ on Polymarket, $100 pays $11,111 (111x)
Polymarket
Contract
SSC Napoli 5 - 1 AS Roma
Last price
0.6%
As of
Polled just now
Buy Yes
0.9¢
Sell Yes
0.2¢
$100 on Yes pays
$11,111 (111x)
Trade this on Polymarket
AS Roma wins 1H 3-2
0.5%
Kalshi 0.5%polled, 60s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
AS Roma wins 1H 3-2
Last price
0.5%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Trade this on Kalshi
SSC Napoli
0.5%
Polymarket 0.5%polled, 60s agoBest Yes 0.7¢ on Polymarket, $100 pays $14,286 (143x)
Polymarket
Contract
SSC Napoli 4 - 3 AS Roma
Last price
0.5%
As of
Polled just now
Buy Yes
0.7¢
Sell Yes
0.3¢
$100 on Yes pays
$14,286 (143x)
Volume
$5
Trade this on Polymarket
SSC Napoli
0.5%
Polymarket 0.5%polled, 60s agoBest Yes 0.7¢ on Polymarket, $100 pays $14,286 (143x)
Polymarket
Contract
SSC Napoli 3 - 4 AS Roma
Last price
0.5%
As of
Polled just now
Buy Yes
0.7¢
Sell Yes
0.3¢
$100 on Yes pays
$14,286 (143x)
Volume
$5
Trade this on Polymarket
SSC Napoli
0.5%
Kalshi 0.5%polled, 60s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
SSC Napoli wins 1H 3-1
Last price
0.5%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Trade this on Kalshi
SSC Napoli
0.5%
Kalshi 0.5%polled, 60s agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
SSC Napoli wins 1H 3-2
Last price
0.5%
As of
Polled just now
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Trade this on Kalshi
SSC Napoli
0.5%
Polymarket 0.5%polled, 60s agoBest Yes 0.7¢ on Polymarket, $100 pays $14,286 (143x)
Polymarket
Contract
SSC Napoli 0 - 5 AS Roma
Last price
0.5%
As of
Polled just now
Buy Yes
0.7¢
Sell Yes
0.2¢
$100 on Yes pays
$14,286 (143x)
Trade this on Polymarket
SSC Napoli
0.4%
Polymarket 0.4%polled, 60s agoBest Yes 0.8¢ on Polymarket, $100 pays $12,500 (125x)
Polymarket
Contract
SSC Napoli 2 - 5 AS Roma
Last price
0.4%
As of
Polled just now
Buy Yes
0.8¢
Sell Yes
—
$100 on Yes pays
$12,500 (125x)
Trade this on Polymarket
SSC Napoli
0.4%
Polymarket 0.4%polled, 60s agoBest Yes 0.7¢ on Polymarket, $100 pays $14,286 (143x)
Polymarket
Contract
SSC Napoli 5 - 0 AS Roma
Last price
0.4%
As of
Polled just now
Buy Yes
0.7¢
Sell Yes
—
$100 on Yes pays
$14,286 (143x)
Volume
$5
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: legaseriea.it
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: FIFA

How the odds have moved

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

  • AS Roma
  • SSC Napoli
  • SSC Napoli

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.

Polymarket

Open on Polymarket ↗

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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Kalshi

Kalshi doesn’t list AS Roma for this event.

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

About this market

Live prediction market odds for "SSC Napoli vs AS Roma: 1st Half Correct Score". AS Roma leads at 35.5%. Next is SSC Napoli at 35.5%. $57K has traded across 55 outcomes on Polymarket and Kalshi. The market is expected to resolve by Oct 26, 2026.

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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