The Prediction Markets

What will S&P 500 (SPY) hit in May 2026?

FinalKickoff
Traded
$487K
Venues
Polymarket
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This market has closed

Trading ended on Jun 1, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets

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 160 days ago. Ages are as of when this page was built.

  • Polymarket
730
69.5%
Polymarket 69.5%polled, 3856 h agoBest Yes 70¢ on Polymarket, $100 pays $143 (1.43x)
Polymarket
Contract
730
Last price
69.5%
As of
Polled 160 d ago
Buy Yes
70¢
Sell Yes
69¢
$100 on Yes pays
$143 (1.43x)
Volume
$21K
Trade this on Polymarket
720
50.5%
Polymarket 50.5%polled, 3856 h agoBest Yes 51¢ on Polymarket, $100 pays $196 (1.96x)
Polymarket
Contract
720
Last price
50.5%
As of
Polled 160 d ago
Buy Yes
51¢
Sell Yes
50¢
$100 on Yes pays
$196 (1.96x)
Volume
$30K
Trade this on Polymarket
750
47.5%
Polymarket 47.5%polled, 3856 h agoBest Yes 48¢ on Polymarket, $100 pays $208 (2.08x)
Polymarket
Contract
750
Last price
47.5%
As of
Polled 160 d ago
Buy Yes
48¢
Sell Yes
47¢
$100 on Yes pays
$208 (2.08x)
Volume
$71K
Trade this on Polymarket
760
31.8%
Polymarket 31.8%polled, 3856 h agoBest Yes 31.8¢ on Polymarket, $100 pays $314 (3.14x)
Polymarket
Contract
760
Last price
31.8%
As of
Polled 160 d ago
Buy Yes
31.8¢
Sell Yes
31.7¢
$100 on Yes pays
$314 (3.14x)
Volume
$43K
Trade this on Polymarket
710
25.5%
Polymarket 25.5%polled, 3856 h agoBest Yes 26¢ on Polymarket, $100 pays $385 (3.85x)
Polymarket
Contract
710
Last price
25.5%
As of
Polled 160 d ago
Buy Yes
26¢
Sell Yes
25¢
$100 on Yes pays
$385 (3.85x)
Volume
$59K
Trade this on Polymarket
700
19.5%
Polymarket 19.5%polled, 3856 h agoBest Yes 20¢ on Polymarket, $100 pays $500 (5.00x)
Polymarket
Contract
700
Last price
19.5%
As of
Polled 160 d ago
Buy Yes
20¢
Sell Yes
19¢
$100 on Yes pays
$500 (5.00x)
Volume
$55K
Trade this on Polymarket
690
15%
Polymarket 15%polled, 3856 h agoBest Yes 16¢ on Polymarket, $100 pays $625 (6.25x)
Polymarket
Contract
690
Last price
15%
As of
Polled 160 d ago
Buy Yes
16¢
Sell Yes
14¢
$100 on Yes pays
$625 (6.25x)
Volume
$22K
Trade this on Polymarket
770
8.8%
Polymarket 8.8%polled, 3856 h agoBest Yes 9¢ on Polymarket, $100 pays $1,111 (11.1x)
Polymarket
Contract
770
Last price
8.8%
As of
Polled 160 d ago
Buy Yes
9¢
Sell Yes
8.5¢
$100 on Yes pays
$1,111 (11.1x)
Volume
$19K
Trade this on Polymarket
680
7.5%
Polymarket 7.5%polled, 3856 h agoBest Yes 8¢ on Polymarket, $100 pays $1,250 (12.5x)
Polymarket
Contract
680
Last price
7.5%
As of
Polled 160 d ago
Buy Yes
8¢
Sell Yes
7¢
$100 on Yes pays
$1,250 (12.5x)
Volume
$12K
Trade this on Polymarket
780
4.6%
Polymarket 4.6%polled, 3856 h agoBest Yes 5.8¢ on Polymarket, $100 pays $1,724 (17.2x)
Polymarket
Contract
780
Last price
4.6%
As of
Polled 160 d ago
Buy Yes
5.8¢
Sell Yes
3.4¢
$100 on Yes pays
$1,724 (17.2x)
Volume
$13K
Trade this on Polymarket
Show 5 more outcomes
800
2.6%
Polymarket 2.6%polled, 3856 h agoBest Yes 4.9¢ on Polymarket, $100 pays $2,041 (20.4x)
Polymarket
Contract
800
Last price
2.6%
As of
Polled 160 d ago
Buy Yes
4.9¢
Sell Yes
0.3¢
$100 on Yes pays
$2,041 (20.4x)
Volume
$170
Trade this on Polymarket
660
2%
Polymarket 2%polled, 3856 h agoBest Yes 2.5¢ on Polymarket, $100 pays $4,000 (40.0x)
Polymarket
Contract
660
Last price
2%
As of
Polled 160 d ago
Buy Yes
2.5¢
Sell Yes
1.5¢
$100 on Yes pays
$4,000 (40.0x)
Volume
$7K
Trade this on Polymarket
790
2%
Polymarket 2%polled, 3856 h agoBest Yes 3.8¢ on Polymarket, $100 pays $2,632 (26.3x)
Polymarket
Contract
790
Last price
2%
As of
Polled 160 d ago
Buy Yes
3.8¢
Sell Yes
0.2¢
$100 on Yes pays
$2,632 (26.3x)
Volume
$1K
Trade this on Polymarket
670
2%
Polymarket 2%polled, 3856 h agoBest Yes 2.4¢ on Polymarket, $100 pays $4,167 (41.7x)
Polymarket
Contract
670
Last price
2%
As of
Polled 160 d ago
Buy Yes
2.4¢
Sell Yes
1.5¢
$100 on Yes pays
$4,167 (41.7x)
Volume
$9K
Trade this on Polymarket
650
1.9%
Polymarket 1.9%polled, 3856 h agoBest Yes 2.6¢ on Polymarket, $100 pays $3,846 (38.5x)
Polymarket
Contract
650
Last price
1.9%
As of
Polled 160 d ago
Buy Yes
2.6¢
Sell Yes
1.1¢
$100 on Yes pays
$3,846 (38.5x)
Volume
$13K
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: pythdata.app

How the odds have moved

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

  • 730
  • 720
  • 750

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

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Best bid
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Best ask
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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 (other / general rate). Fee calculator. Estimates only, not advice.

About this market

Final prediction market prices for "What will S&P 500 (SPY) hit in May 2026?". 730 last traded at 69.5%. Next is 720 at 50.5%. $487K has traded across 15 outcomes on Polymarket. The market closed on Jun 1, 2026.

What will S&P 500 (SPY) hit in May 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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