The Prediction Markets

West Ham vs Southampton: First Half BTTS

Starts in 1 h 8 minKickoff
Traded
$18K
Venues
Polymarket, Kalshi
Prices updated
just now
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What the markets expect

West Ham United FC 57.5%

Next is 1st Half: Both Teams To Score at 26%. 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, the oldest 4 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
West Ham United FC
57.5%
Polymarket 57.5%polled, 24s agoBest Yes 58¢ on Polymarket, $100 pays $172 (1.72x)
Polymarket
Contract
West Ham United FC
Last price
57.5%
As of
Polled just now
Buy Yes
58¢
Sell Yes
57¢
$100 on Yes pays
$172 (1.72x)
Volume
$16K
Trade this on Polymarket
1st Half: Both Teams To Score
26%
Kalshi 26%polled, 4 min agoBest Yes 26¢ on Kalshi, $100 pays $385 (3.85x)
Kalshi
Contract
1st Half: Both Teams To Score
Last price
26%
As of
Polled 4 min ago
Buy Yes
26¢
Sell Yes
25¢
$100 on Yes pays
$385 (3.85x)
Volume
$2K
Trade this on Kalshi
Draw (West Ham United FC vs. Southampton FC)
22.5%
Polymarket 22.5%polled, 24s agoBest Yes 23¢ on Polymarket, $100 pays $435 (4.35x)
Polymarket
Contract
Draw (West Ham United FC vs. Southampton FC)
Last price
22.5%
As of
Polled just now
Buy Yes
23¢
Sell Yes
22¢
$100 on Yes pays
$435 (4.35x)
Volume
$172
Trade this on Polymarket
Southampton FC
20.5%
Polymarket 20.5%polled, 24s agoBest Yes 21¢ on Polymarket, $100 pays $476 (4.76x)
Polymarket
Contract
Southampton FC
Last price
20.5%
As of
Polled just now
Buy Yes
21¢
Sell Yes
20¢
$100 on Yes pays
$476 (4.76x)
Volume
$799
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: efl.com
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Fox Sports, ESPN

How the odds have moved

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

  • West Ham United FC
  • 1st Half: Both Teams To Score
  • Draw (West Ham United FC vs. Southampton FC)

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

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Best bid
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Spread
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Best ask
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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 West Ham United FC 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.

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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 (sports rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "West Ham vs Southampton: First Half BTTS". West Ham United FC leads at 57.5%. Next is 1st Half: Both Teams To Score at 26%. $18K has traded across 4 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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