The Prediction Markets

Harry Potter and the Philosopher's Stone · Rotten Tomatoes score

Full timeKickoff Waiting for the venues to settle
Traded
$11K
Venues
Polymarket, Kalshi
Prices updated
just now
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What the markets expect

Above 55 96%

Next is Above 60 at 96%. 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
Above 55
96%
Kalshi 96%polled, 35s ago
Kalshi
Contract
Above 55
Last price
96%
As of
Polled just now
Buy Yes
—
Sell Yes
27¢
Volume
$6
Trade this on Kalshi
Above 60
96%
Kalshi 96%polled, 35s ago
Kalshi
Contract
Above 60
Last price
96%
As of
Polled just now
Buy Yes
—
Sell Yes
25¢
Volume
$12
Trade this on Kalshi
Above 65
95%
Kalshi 95%polled, 35s agoBest Yes 97¢ on Kalshi, $100 pays $103 (1.03x)
Kalshi
Contract
Above 65
Last price
95%
As of
Polled just now
Buy Yes
97¢
Sell Yes
70¢
$100 on Yes pays
$103 (1.03x)
Volume
$791
Trade this on Kalshi
Above 75
95%
Kalshi 95%polled, 35s agoBest Yes 95¢ on Kalshi, $100 pays $105 (1.05x)
Kalshi
Contract
Above 75
Last price
95%
As of
Polled just now
Buy Yes
95¢
Sell Yes
42¢
$100 on Yes pays
$105 (1.05x)
Volume
$859
Trade this on Kalshi
Above 80
91%
Kalshi 91%polled, 35s agoBest Yes 91¢ on Kalshi, $100 pays $110 (1.10x)
Kalshi
Contract
Above 80
Last price
91%
As of
Polled just now
Buy Yes
91¢
Sell Yes
23¢
$100 on Yes pays
$110 (1.10x)
Volume
$7
Trade this on Kalshi
Above 85
85%
Kalshi 85%polled, 35s agoBest Yes 85¢ on Kalshi, $100 pays $118 (1.18x)
Kalshi
Contract
Above 85
Last price
85%
As of
Polled just now
Buy Yes
85¢
Sell Yes
27¢
$100 on Yes pays
$118 (1.18x)
Volume
$242
Trade this on Kalshi
20+
81.5%
Polymarket 81.5%polled, 35s agoBest Yes 99¢ on Polymarket, $100 pays $101 (1.01x)
Polymarket
Contract
20+
Last price
81.5%
As of
Polled just now
Buy Yes
99¢
Sell Yes
64¢
$100 on Yes pays
$101 (1.01x)
Volume
$608
Trade this on Polymarket
Above 45
66.5%
Kalshi 66.5%polled, 35s ago
Kalshi
Contract
Above 45
Last price
66.5%
As of
Polled just now
Buy Yes
—
Sell Yes
33¢
Trade this on Kalshi
Above 90
66%
Kalshi 66%polled, 35s agoBest Yes 66¢ on Kalshi, $100 pays $152 (1.52x)
Kalshi
Contract
Above 90
Last price
66%
As of
Polled just now
Buy Yes
66¢
Sell Yes
17¢
$100 on Yes pays
$152 (1.52x)
Volume
$131
Trade this on Kalshi
Above 50
64.5%
Kalshi 64.5%polled, 35s ago
Kalshi
Contract
Above 50
Last price
64.5%
As of
Polled just now
Buy Yes
—
Sell Yes
29¢
Trade this on Kalshi
Show 5 more outcomes
Above 70
61%
Kalshi 61%polled, 35s ago
Kalshi
Contract
Above 70
Last price
61%
As of
Polled just now
Buy Yes
—
Sell Yes
22¢
Trade this on Kalshi
25+
41.5%
Polymarket 41.5%polled, 35s agoBest Yes 74¢ on Polymarket, $100 pays $135 (1.35x)
Polymarket
Contract
25+
Last price
41.5%
As of
Polled just now
Buy Yes
74¢
Sell Yes
9¢
$100 on Yes pays
$135 (1.35x)
Volume
$5K
Trade this on Polymarket
30+
25%
Polymarket 25%polled, 35s agoBest Yes 47¢ on Polymarket, $100 pays $213 (2.13x)
Polymarket
Contract
30+
Last price
25%
As of
Polled just now
Buy Yes
47¢
Sell Yes
3¢
$100 on Yes pays
$213 (2.13x)
Volume
$776
Trade this on Polymarket
35+
5%
Polymarket 5%polled, 35s agoBest Yes 7¢ on Polymarket, $100 pays $1,429 (14.3x)
Polymarket
Contract
35+
Last price
5%
As of
Polled just now
Buy Yes
7¢
Sell Yes
3¢
$100 on Yes pays
$1,429 (14.3x)
Volume
$2K
Trade this on Polymarket
40+
3%
Polymarket 3%polled, 35s agoBest Yes 4.8¢ on Polymarket, $100 pays $2,083 (20.8x)
Polymarket
Contract
40+
Last price
3%
As of
Polled just now
Buy Yes
4.8¢
Sell Yes
1.1¢
$100 on Yes pays
$2,083 (20.8x)
Volume
$251
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: Rotten Tomatoes

How the odds have moved

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

  • Above 55
  • Above 60
  • Above 65

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

Polymarket doesn’t list Above 55 for this event.

Kalshi

Open on Kalshi ↗

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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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

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

About this market

Live prediction market odds for "Harry Potter and the Philosopher's Stone · Rotten Tomatoes score". Above 55 leads at 96%. Next is Above 60 at 96%. $11K has traded across 15 outcomes on Polymarket and Kalshi. The market is expected to resolve by Dec 28, 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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