The Prediction Markets

Which companies will be added to the S&P 500 in Q4?

Closes
Jan 1, 2027, in 2 months
Traded
$3K
Venues
Kalshi
Prices updated
just now
Share

What the markets expect

Twilio 99%

Next is Cheniere Energy at 34%. 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
Twilio
99%
Kalshi 99%polled, 59s ago
Kalshi
Contract
Twilio
Last price
99%
As of
Polled just now
Buy Yes
—
Sell Yes
96¢
Volume
$400
Trade this on Kalshi
Cheniere Energy
34%
Kalshi 34%polled, 59s agoBest Yes 34¢ on Kalshi, $100 pays $294 (2.94x)
Kalshi
Contract
Cheniere Energy
Last price
34%
As of
Polled just now
Buy Yes
34¢
Sell Yes
25¢
$100 on Yes pays
$294 (2.94x)
Volume
$304
Trade this on Kalshi
Astera Labs
21%
Kalshi 21%polled, 59s agoBest Yes 27¢ on Kalshi, $100 pays $370 (3.70x)
Kalshi
Contract
Astera Labs
Last price
21%
As of
Polled just now
Buy Yes
27¢
Sell Yes
21¢
$100 on Yes pays
$370 (3.70x)
Volume
$387
Trade this on Kalshi
Okta
19%
Kalshi 19%polled, 59s agoBest Yes 90¢ on Kalshi, $100 pays $111 (1.11x)
Kalshi
Contract
Okta
Last price
19%
As of
Polled just now
Buy Yes
90¢
Sell Yes
12¢
$100 on Yes pays
$111 (1.11x)
Volume
$280
Trade this on Kalshi
Affirm Holdings
13%
Kalshi 13%polled, 59s agoBest Yes 15¢ on Kalshi, $100 pays $667 (6.67x)
Kalshi
Contract
Affirm Holdings
Last price
13%
As of
Polled just now
Buy Yes
15¢
Sell Yes
8¢
$100 on Yes pays
$667 (6.67x)
Volume
$157
Trade this on Kalshi
ATI
13%
Kalshi 13%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
ATI
Last price
13%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Volume
$182
Trade this on Kalshi
Credo Technology
11%
Kalshi 11%polled, 59s agoBest Yes 15¢ on Kalshi, $100 pays $667 (6.67x)
Kalshi
Contract
Credo Technology
Last price
11%
As of
Polled just now
Buy Yes
15¢
Sell Yes
11¢
$100 on Yes pays
$667 (6.67x)
Volume
$220
Trade this on Kalshi
Curtiss-Wright
10%
Kalshi 10%polled, 59s agoBest Yes 11¢ on Kalshi, $100 pays $909 (9.09x)
Kalshi
Contract
Curtiss-Wright
Last price
10%
As of
Polled just now
Buy Yes
11¢
Sell Yes
4¢
$100 on Yes pays
$909 (9.09x)
Volume
$3
Trade this on Kalshi
HEICO
10%
Kalshi 10%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
HEICO
Last price
10%
As of
Polled just now
Buy Yes
10¢
Sell Yes
4¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$150
Trade this on Kalshi
MongoDB
10%
Kalshi 10%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
MongoDB
Last price
10%
As of
Polled just now
Buy Yes
10¢
Sell Yes
4¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$119
Trade this on Kalshi
Show 25 more outcomes
Southern Copper
9%
Kalshi 9%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Southern Copper
Last price
9%
As of
Polled just now
Buy Yes
13¢
Sell Yes
5¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Atlassian
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Atlassian
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Circle Internet Group
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Circle Internet Group
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
LPL Financial
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
LPL Financial
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Natera
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Natera
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Rocket Companies
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Rocket Companies
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Snowflake
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Snowflake
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
TPG
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
TPG
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Tradeweb Markets
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Tradeweb Markets
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
Venture Global
8.5%
Kalshi 8.5%polled, 59s agoBest Yes 13¢ on Kalshi, $100 pays $769 (7.69x)
Kalshi
Contract
Venture Global
Last price
8.5%
As of
Polled just now
Buy Yes
13¢
Sell Yes
4¢
$100 on Yes pays
$769 (7.69x)
Trade this on Kalshi
BWX Technologies
8%
Kalshi 8%polled, 59s agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
BWX Technologies
Last price
8%
As of
Polled just now
Buy Yes
12¢
Sell Yes
4¢
$100 on Yes pays
$833 (8.33x)
Trade this on Kalshi
Guidewire Software
8%
Kalshi 8%polled, 59s agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
Guidewire Software
Last price
8%
As of
Polled just now
Buy Yes
12¢
Sell Yes
4¢
$100 on Yes pays
$833 (8.33x)
Trade this on Kalshi
Roblox
8%
Kalshi 8%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Roblox
Last price
8%
As of
Polled just now
Buy Yes
10¢
Sell Yes
2¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$201
Trade this on Kalshi
SoFi
8%
Kalshi 8%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
SoFi
Last price
8%
As of
Polled just now
Buy Yes
10¢
Sell Yes
2¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$107
Trade this on Kalshi
SpaceX
8%
Kalshi 8%polled, 59s agoBest Yes 8¢ on Kalshi, $100 pays $1,250 (12.5x)
Kalshi
Contract
SpaceX
Last price
8%
As of
Polled just now
Buy Yes
8¢
Sell Yes
2¢
$100 on Yes pays
$1,250 (12.5x)
Volume
$300
Trade this on Kalshi
Talen Energy
8%
Kalshi 8%polled, 59s agoBest Yes 12¢ on Kalshi, $100 pays $833 (8.33x)
Kalshi
Contract
Talen Energy
Last price
8%
As of
Polled just now
Buy Yes
12¢
Sell Yes
4¢
$100 on Yes pays
$833 (8.33x)
Trade this on Kalshi
Duolingo
7%
Kalshi 7%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Duolingo
Last price
7%
As of
Polled just now
Buy Yes
10¢
Sell Yes
4¢
$100 on Yes pays
$1,000 (10.0x)
Trade this on Kalshi
Alnylam Pharmaceuticals
5%
Kalshi 5%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Alnylam Pharmaceuticals
Last price
5%
As of
Polled just now
Buy Yes
10¢
Sell Yes
5¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$104
Trade this on Kalshi
Cloudflare
5%
Kalshi 5%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Cloudflare
Last price
5%
As of
Polled just now
Buy Yes
10¢
Sell Yes
4¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$531
Trade this on Kalshi
CoreWeave
4%
Kalshi 4%polled, 59s agoBest Yes 8¢ on Kalshi, $100 pays $1,250 (12.5x)
Kalshi
Contract
CoreWeave
Last price
4%
As of
Polled just now
Buy Yes
8¢
Sell Yes
—
$100 on Yes pays
$1,250 (12.5x)
Trade this on Kalshi
Strategy (MicroStrategy)
4%
Kalshi 4%polled, 59s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
Strategy (MicroStrategy)
Last price
4%
As of
Polled just now
Buy Yes
4¢
Sell Yes
—
$100 on Yes pays
$2,500 (25.0x)
Volume
$17
Trade this on Kalshi
Toast
4%
Kalshi 4%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Toast
Last price
4%
As of
Polled just now
Buy Yes
10¢
Sell Yes
4¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$1
Trade this on Kalshi
Zoom
4%
Kalshi 4%polled, 59s agoBest Yes 10¢ on Kalshi, $100 pays $1,000 (10.0x)
Kalshi
Contract
Zoom
Last price
4%
As of
Polled just now
Buy Yes
10¢
Sell Yes
3¢
$100 on Yes pays
$1,000 (10.0x)
Volume
$33
Trade this on Kalshi
Cerebras
2%
Kalshi 2%polled, 59s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
Cerebras
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
Medline
2%
Kalshi 2%polled, 59s agoBest Yes 4¢ on Kalshi, $100 pays $2,500 (25.0x)
Kalshi
Contract
Medline
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

Who resolves this market

Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: S&P Global

How the odds have moved

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

  • Twilio
  • Cheniere Energy
  • Astera Labs

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.

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

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

About this market

Live prediction market odds for "Which companies will be added to the S&P 500 in Q4?". Twilio leads at 99%. Next is Cheniere Energy at 34%. $3K has traded across 35 outcomes on Kalshi. The market is expected to resolve by Jan 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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