The Prediction Markets

New York vs Boston

Starts in 25 hKickoff
Traded
$123K
Venues
Polymarket, Kalshi
Prices updated
just now
Share

What the markets expect

O/U 209.5 79.5%

Next is O/U 212.5 at 74.5%. Polymarket and Kalshi agree within 1 point on each matched outcome.

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
O/U 209.5
79.5%
Polymarket 79.5%polled, 49s agoBest Yes 81¢ on Polymarket, $100 pays $123 (1.23x)
Polymarket
Contract
O/U 209.5
Last price
79.5%
As of
Polled just now
Buy Yes
81¢
Sell Yes
78¢
$100 on Yes pays
$123 (1.23x)
Trade this on Polymarket
O/U 212.5
74.5%
Polymarket 74.5%polled, 49s agoBest Yes 76¢ on Polymarket, $100 pays $132 (1.32x)
Polymarket
Contract
O/U 212.5
Last price
74.5%
As of
Polled just now
Buy Yes
76¢
Sell Yes
73¢
$100 on Yes pays
$132 (1.32x)
Volume
$62
Trade this on Polymarket
1H Spread -0.5
70%
Polymarket 70%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
1H Spread -0.5
Last price
70%
As of
Polled just now
Buy Yes
97¢
Sell Yes
43¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
O/U 215.5
68.5%
Polymarket 68.5%polled, 49s agoBest Yes 70¢ on Polymarket, $100 pays $143 (1.43x)
Polymarket
Contract
O/U 215.5
Last price
68.5%
As of
Polled just now
Buy Yes
70¢
Sell Yes
67¢
$100 on Yes pays
$143 (1.43x)
Volume
$113
Trade this on Polymarket
O/U 218.5
62%
Polymarket 62%polled, 49s agoBest Yes 63¢ on Polymarket, $100 pays $159 (1.59x)
Polymarket
Contract
O/U 218.5
Last price
62%
As of
Polled just now
Buy Yes
63¢
Sell Yes
61¢
$100 on Yes pays
$159 (1.59x)
Trade this on Polymarket
O/U 220.5
58%
Polymarket 58%polled, 49s agoBest Yes 59¢ on Polymarket, $100 pays $169 (1.69x)
Polymarket
Contract
O/U 220.5
Last price
58%
As of
Polled just now
Buy Yes
59¢
Sell Yes
57¢
$100 on Yes pays
$169 (1.69x)
Trade this on Polymarket
Jayson Tatum: Assists O/U 5.5
57.5%
Polymarket 57.5%polled, 49s agoBest Yes 60¢ on Polymarket, $100 pays $167 (1.67x)
Polymarket
Contract
Jayson Tatum: Assists O/U 5.5
Last price
57.5%
As of
Polled just now
Buy Yes
60¢
Sell Yes
55¢
$100 on Yes pays
$167 (1.67x)
Trade this on Polymarket
O/U 221.5
56.5%
Polymarket 56.5%polled, 49s agoBest Yes 57¢ on Polymarket, $100 pays $175 (1.75x)
Polymarket
Contract
O/U 221.5
Last price
56.5%
As of
Polled just now
Buy Yes
57¢
Sell Yes
56¢
$100 on Yes pays
$175 (1.75x)
Volume
$489
Trade this on Polymarket
Boston
55%
Kalshi 55%polled, 49s agoBest Yes 55¢ on Kalshi, $100 pays $182 (1.82x)
Kalshi
Contract
Boston
Last price
55%
As of
Polled just now
Buy Yes
55¢
Sell Yes
54¢
$100 on Yes pays
$182 (1.82x)
Volume
$6K
Trade this on Kalshi
OG Anunoby: Assists O/U 1.5
55%
Polymarket 55%polled, 49s agoBest Yes 60¢ on Polymarket, $100 pays $167 (1.67x)
Polymarket
Contract
OG Anunoby: Assists O/U 1.5
Last price
55%
As of
Polled just now
Buy Yes
60¢
Sell Yes
50¢
$100 on Yes pays
$167 (1.67x)
Trade this on Polymarket
Show 46 more outcomes
Karl-Anthony Towns: Points O/U 18.5
54.5%
Polymarket 54.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Karl-Anthony Towns: Points O/U 18.5
Last price
54.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
12¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Jalen Brunson: Points O/U 25.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Jalen Brunson: Points O/U 25.5
Last price
53.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
10¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Jayson Tatum: Points O/U 25.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Jayson Tatum: Points O/U 25.5
Last price
53.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
10¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Jayson Tatum: Points O/U 26.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Jayson Tatum: Points O/U 26.5
Last price
53.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
10¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Mikal Bridges: Points O/U 11.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Mikal Bridges: Points O/U 11.5
Last price
53.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
10¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
O/U 222.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 54¢ on Polymarket, $100 pays $185 (1.85x)
Polymarket
Contract
O/U 222.5
Last price
53.5%
As of
Polled just now
Buy Yes
54¢
Sell Yes
53¢
$100 on Yes pays
$185 (1.85x)
Volume
$167
Trade this on Polymarket
OG Anunoby: Points O/U 16.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
OG Anunoby: Points O/U 16.5
Last price
53.5%
As of
Polled just now
Buy Yes
97¢
Sell Yes
10¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Paul George: Assists O/U 2.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Paul George: Assists O/U 2.5
Last price
53.5%
As of
Polled just now
Buy Yes
96¢
Sell Yes
11¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Spread -1.5
53.5%
Polymarket 53.5%polled, 49s agoBest Yes 54¢ on Polymarket, $100 pays $185 (1.85x)
Polymarket
Contract
Spread -1.5
Last price
53.5%
As of
Polled just now
Buy Yes
54¢
Sell Yes
53¢
$100 on Yes pays
$185 (1.85x)
Volume
$4K
Trade this on Polymarket
Jalen Brunson: Assists O/U 6.5
53%
Polymarket 53%polled, 49s agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Jalen Brunson: Assists O/U 6.5
Last price
53%
As of
Polled just now
Buy Yes
96¢
Sell Yes
10¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Jayson Tatum: Rebounds O/U 8.5
53%
Polymarket 53%polled, 49s agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Jayson Tatum: Rebounds O/U 8.5
Last price
53%
As of
Polled just now
Buy Yes
96¢
Sell Yes
10¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Karl-Anthony Towns: Assists O/U 4.5
53%
Polymarket 53%polled, 49s agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Karl-Anthony Towns: Assists O/U 4.5
Last price
53%
As of
Polled just now
Buy Yes
96¢
Sell Yes
10¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
Paul George: Points O/U 17.5
53%
Polymarket 53%polled, 49s agoBest Yes 96¢ on Polymarket, $100 pays $104 (1.04x)
Polymarket
Contract
Paul George: Points O/U 17.5
Last price
53%
As of
Polled just now
Buy Yes
96¢
Sell Yes
10¢
$100 on Yes pays
$104 (1.04x)
Trade this on Polymarket
O/U 223.5
52.5%
Polymarket 52.5%polled, 49s agoBest Yes 53¢ on Polymarket, $100 pays $189 (1.89x)
Polymarket
Contract
O/U 223.5
Last price
52.5%
As of
Polled just now
Buy Yes
53¢
Sell Yes
52¢
$100 on Yes pays
$189 (1.89x)
Volume
$3K
Trade this on Polymarket
Odd/Even Score
50%
Polymarket 50%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Odd/Even Score
Last price
50%
As of
Polled just now
Buy Yes
97¢
Sell Yes
3¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Team to Score First
50%
Polymarket 50%polled, 49s agoBest Yes 97¢ on Polymarket, $100 pays $103 (1.03x)
Polymarket
Contract
Team to Score First
Last price
50%
As of
Polled just now
Buy Yes
97¢
Sell Yes
3¢
$100 on Yes pays
$103 (1.03x)
Trade this on Polymarket
Spread: Celtics (-2.5)
49%
Polymarket 49%polled, 49s agoBest Yes 50¢ on Polymarket, $100 pays $200 (2.00x)
Polymarket
Contract
Spread: Celtics (-2.5)
Last price
49%
As of
Polled just now
Buy Yes
50¢
Sell Yes
48¢
$100 on Yes pays
$200 (2.00x)
Volume
$859
Trade this on Polymarket
1H Moneyline
48.5%
Polymarket 48.5%polled, 49s agoBest Yes 94¢ on Polymarket, $100 pays $106 (1.06x)
Polymarket
Contract
1H Moneyline
Last price
48.5%
As of
Polled just now
Buy Yes
94¢
Sell Yes
3¢
$100 on Yes pays
$106 (1.06x)
Trade this on Polymarket
O/U 224.5
48.5%
Polymarket 48.5%polled, 49s agoBest Yes 49¢ on Polymarket, $100 pays $204 (2.04x)
Polymarket
Contract
O/U 224.5
Last price
48.5%
As of
Polled just now
Buy Yes
49¢
Sell Yes
48¢
$100 on Yes pays
$204 (2.04x)
Volume
$299
Trade this on Polymarket
1H O/U 115.5
48%
Polymarket 48%polled, 49s agoBest Yes 53¢ on Polymarket, $100 pays $189 (1.89x)
Polymarket
Contract
1H O/U 115.5
Last price
48%
As of
Polled just now
Buy Yes
53¢
Sell Yes
43¢
$100 on Yes pays
$189 (1.89x)
Trade this on Polymarket
1H Spread -1.5
48%
Polymarket 48%polled, 49s agoBest Yes 53¢ on Polymarket, $100 pays $189 (1.89x)
Polymarket
Contract
1H Spread -1.5
Last price
48%
As of
Polled just now
Buy Yes
53¢
Sell Yes
43¢
$100 on Yes pays
$189 (1.89x)
Trade this on Polymarket
Karl-Anthony Towns: Rebounds O/U 11.5
46.5%
Polymarket 46.5%polled, 49s agoBest Yes 50¢ on Polymarket, $100 pays $200 (2.00x)
Polymarket
Contract
Karl-Anthony Towns: Rebounds O/U 11.5
Last price
46.5%
As of
Polled just now
Buy Yes
50¢
Sell Yes
43¢
$100 on Yes pays
$200 (2.00x)
Trade this on Polymarket
O/U 225.5
46.5%
Polymarket 46.5%polled, 49s agoBest Yes 47¢ on Polymarket, $100 pays $213 (2.13x)
Polymarket
Contract
O/U 225.5
Last price
46.5%
As of
Polled just now
Buy Yes
47¢
Sell Yes
46¢
$100 on Yes pays
$213 (2.13x)
Volume
$912
Trade this on Polymarket
O/U 226.5
45%
Polymarket 45%polled, 49s agoBest Yes 46¢ on Polymarket, $100 pays $217 (2.17x)
Polymarket
Contract
O/U 226.5
Last price
45%
As of
Polled just now
Buy Yes
46¢
Sell Yes
44¢
$100 on Yes pays
$217 (2.17x)
Volume
$23
Trade this on Polymarket
New York
44.8%
Polymarket 44.5%polled, 49s agoKalshi 45%polled, 49s agoBest Yes 45¢ on Polymarket, $100 pays $222 (2.22x)
Polymarket
Contract
Knicks vs. Celtics
Last price
44.5%
As of
Polled just now
Buy Yes
45¢
Sell Yes
44¢
$100 on Yes pays
$222 (2.22x)
Volume
$42K
Trade this on Polymarket
Kalshi
Contract
New York
Last price
45%
As of
Polled just now
Buy Yes
45¢
Sell Yes
44¢
$100 on Yes pays
$222 (2.22x)
Volume
$61K
Trade this on Kalshi
Partial parity

Payoffs match in ordinary outcomes; see the rule differences below the table.

No arbitrage: the best bid elsewhere is 44¢, at or below the cheapest ask of 45¢.

Spread -4.5
42.5%
Polymarket 42.5%polled, 49s agoBest Yes 43¢ on Polymarket, $100 pays $233 (2.33x)
Polymarket
Contract
Spread -4.5
Last price
42.5%
As of
Polled just now
Buy Yes
43¢
Sell Yes
42¢
$100 on Yes pays
$233 (2.33x)
Volume
$4K
Trade this on Polymarket
Jalen Brunson: Rebounds O/U 3.5
41%
Polymarket 41%polled, 49s agoBest Yes 45¢ on Polymarket, $100 pays $222 (2.22x)
Polymarket
Contract
Jalen Brunson: Rebounds O/U 3.5
Last price
41%
As of
Polled just now
Buy Yes
45¢
Sell Yes
37¢
$100 on Yes pays
$222 (2.22x)
Trade this on Polymarket
O/U 228.5
41%
Polymarket 41%polled, 49s agoBest Yes 42¢ on Polymarket, $100 pays $238 (2.38x)
Polymarket
Contract
O/U 228.5
Last price
41%
As of
Polled just now
Buy Yes
42¢
Sell Yes
40¢
$100 on Yes pays
$238 (2.38x)
Trade this on Polymarket
Mikal Bridges: Rebounds O/U 3.5
40.5%
Polymarket 40.5%polled, 49s agoBest Yes 44¢ on Polymarket, $100 pays $227 (2.27x)
Polymarket
Contract
Mikal Bridges: Rebounds O/U 3.5
Last price
40.5%
As of
Polled just now
Buy Yes
44¢
Sell Yes
37¢
$100 on Yes pays
$227 (2.27x)
Trade this on Polymarket
Spread: Celtics (-5.5)
39.5%
Polymarket 39.5%polled, 49s agoBest Yes 41¢ on Polymarket, $100 pays $244 (2.44x)
Polymarket
Contract
Spread: Celtics (-5.5)
Last price
39.5%
As of
Polled just now
Buy Yes
41¢
Sell Yes
38¢
$100 on Yes pays
$244 (2.44x)
Trade this on Polymarket
Spread: Knicks (-2.5)
39%
Polymarket 39%polled, 49s agoBest Yes 40¢ on Polymarket, $100 pays $250 (2.50x)
Polymarket
Contract
Spread: Knicks (-2.5)
Last price
39%
As of
Polled just now
Buy Yes
40¢
Sell Yes
38¢
$100 on Yes pays
$250 (2.50x)
Volume
$45
Trade this on Polymarket
O/U 231.5
34%
Polymarket 34%polled, 49s agoBest Yes 35¢ on Polymarket, $100 pays $286 (2.86x)
Polymarket
Contract
O/U 231.5
Last price
34%
As of
Polled just now
Buy Yes
35¢
Sell Yes
33¢
$100 on Yes pays
$286 (2.86x)
Trade this on Polymarket
Spread -7.5
33.5%
Polymarket 33.5%polled, 49s agoBest Yes 35¢ on Polymarket, $100 pays $286 (2.86x)
Polymarket
Contract
Spread -7.5
Last price
33.5%
As of
Polled just now
Buy Yes
35¢
Sell Yes
32¢
$100 on Yes pays
$286 (2.86x)
Trade this on Polymarket
Mikal Bridges: Assists O/U 2.5
32%
Polymarket 32%polled, 49s agoBest Yes 54¢ on Polymarket, $100 pays $185 (1.85x)
Polymarket
Contract
Mikal Bridges: Assists O/U 2.5
Last price
32%
As of
Polled just now
Buy Yes
54¢
Sell Yes
10¢
$100 on Yes pays
$185 (1.85x)
Trade this on Polymarket
Karl-Anthony Towns: Points O/U 18.5
31%
Polymarket 31%polled, 49s agoBest Yes 50¢ on Polymarket, $100 pays $200 (2.00x)
Polymarket
Contract
Karl-Anthony Towns: Points O/U 19.5
Last price
31%
As of
Polled just now
Buy Yes
50¢
Sell Yes
12¢
$100 on Yes pays
$200 (2.00x)
Trade this on Polymarket
Spread: Knicks (-5.5)
30%
Polymarket 30%polled, 49s agoBest Yes 31¢ on Polymarket, $100 pays $323 (3.23x)
Polymarket
Contract
Spread: Knicks (-5.5)
Last price
30%
As of
Polled just now
Buy Yes
31¢
Sell Yes
29¢
$100 on Yes pays
$323 (3.23x)
Trade this on Polymarket
O/U 234.5
29%
Polymarket 29%polled, 49s agoBest Yes 30¢ on Polymarket, $100 pays $333 (3.33x)
Polymarket
Contract
O/U 234.5
Last price
29%
As of
Polled just now
Buy Yes
30¢
Sell Yes
28¢
$100 on Yes pays
$333 (3.33x)
Volume
$2
Trade this on Polymarket
Paul George: Assists O/U 3.5
29%
Polymarket 29%polled, 49s agoBest Yes 40¢ on Polymarket, $100 pays $250 (2.50x)
Polymarket
Contract
Paul George: Assists O/U 3.5
Last price
29%
As of
Polled just now
Buy Yes
40¢
Sell Yes
18¢
$100 on Yes pays
$250 (2.50x)
Volume
$9
Trade this on Polymarket
Paul George: Rebounds O/U 4.5
29%
Polymarket 29%polled, 49s agoBest Yes 48¢ on Polymarket, $100 pays $208 (2.08x)
Polymarket
Contract
Paul George: Rebounds O/U 4.5
Last price
29%
As of
Polled just now
Buy Yes
48¢
Sell Yes
10¢
$100 on Yes pays
$208 (2.08x)
Trade this on Polymarket
OG Anunoby: Rebounds O/U 5.5
27.5%
Polymarket 27.5%polled, 49s agoBest Yes 43¢ on Polymarket, $100 pays $233 (2.33x)
Polymarket
Contract
OG Anunoby: Rebounds O/U 5.5
Last price
27.5%
As of
Polled just now
Buy Yes
43¢
Sell Yes
12¢
$100 on Yes pays
$233 (2.33x)
Trade this on Polymarket
Spread -10.5
26%
Polymarket 26%polled, 49s agoBest Yes 27¢ on Polymarket, $100 pays $370 (3.70x)
Polymarket
Contract
Spread -10.5
Last price
26%
As of
Polled just now
Buy Yes
27¢
Sell Yes
25¢
$100 on Yes pays
$370 (3.70x)
Trade this on Polymarket
O/U 237.5
23.5%
Polymarket 23.5%polled, 49s agoBest Yes 25¢ on Polymarket, $100 pays $400 (4.00x)
Polymarket
Contract
O/U 237.5
Last price
23.5%
As of
Polled just now
Buy Yes
25¢
Sell Yes
22¢
$100 on Yes pays
$400 (4.00x)
Trade this on Polymarket
Spread -8.5
22.5%
Polymarket 22.5%polled, 49s agoBest Yes 24¢ on Polymarket, $100 pays $417 (4.17x)
Polymarket
Contract
Spread -8.5
Last price
22.5%
As of
Polled just now
Buy Yes
24¢
Sell Yes
21¢
$100 on Yes pays
$417 (4.17x)
Trade this on Polymarket
Spread -13.5
19.5%
Polymarket 19.5%polled, 49s agoBest Yes 21¢ on Polymarket, $100 pays $476 (4.76x)
Polymarket
Contract
Spread -13.5
Last price
19.5%
As of
Polled just now
Buy Yes
21¢
Sell Yes
18¢
$100 on Yes pays
$476 (4.76x)
Volume
$2
Trade this on Polymarket
Spread -11.5
16.5%
Polymarket 16.5%polled, 49s agoBest Yes 18¢ on Polymarket, $100 pays $556 (5.56x)
Polymarket
Contract
Spread -11.5
Last price
16.5%
As of
Polled just now
Buy Yes
18¢
Sell Yes
15¢
$100 on Yes pays
$556 (5.56x)
Trade this on Polymarket
Spread -16.5
13%
Polymarket 13%polled, 49s agoBest Yes 14¢ on Polymarket, $100 pays $714 (7.14x)
Polymarket
Contract
Spread -16.5
Last price
13%
As of
Polled just now
Buy Yes
14¢
Sell Yes
12¢
$100 on Yes pays
$714 (7.14x)
Trade this on Polymarket

No cross-venue arbitrage right now: on every matched outcome, the best bid on one venue is at or below the cheapest ask on the other. Find markets with open spreads

Same bet: both pay the winner of the game

Ties: both venues pay 50/50.

Only differs in an edge case

  • If the game is postponed: Kalshi resolves to a fair price if the game does not start within 48 hours of the scheduled time; Polymarket stays open until the game is played and resolves 50-50 only if it is cancelled with no make-up.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: nba.com
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: the Governing League, ESPN
Show full rule comparison
  • If the game is postponed: Kalshi resolves to a fair price if the game does not start within 48 hours of the scheduled time; Polymarket stays open until the game is played and resolves 50-50 only if it is cancelled with no make-up.
  • Ties: both venues pay 50/50.
  • Trading closes Oct 23, 2026, 11:00 PM UTC on Polymarket and Oct 25, 2026, 11:00 PM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

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

  • O/U 209.5
  • O/U 212.5
  • 1H Spread -0.5

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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Depth · top 8 levels

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Recent trades

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Kalshi

Kalshi doesn’t list O/U 209.5 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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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 "New York vs Boston". O/U 209.5 leads at 79.5%. Next is O/U 212.5 at 74.5%. $123K has traded across 56 outcomes on Kalshi and Polymarket. The market is expected to resolve by Oct 25, 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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