Tech selloff nudges SpaceX IPO lead down as Polymarket stays at 85.5%
SpaceX IPO 2026 Bet Slips as SpaceX Shares Extend Three-Day Slide and Nasdaq Drops 1.3%
A three-day slide in SpaceX shares and a tech-led pullback in U.S. equities on Monday has coincided with a slight dip in Polymarket pricing for the “Largest IPO by market cap in 2026?” contract. The market’s implied probability for SpaceX as the top 2026 IPO edged down to 85.5% from 86.5%.
Key Takeaways
- Polymarket prices SpaceX as the leading candidate for the largest IPO by market cap in 2026 at 85.5% (No 14.5%).
- Traders marked SpaceX slightly lower as its shares fell for a third straight session amid a broader tech selloff in U.S. stocks.
- The contract is set to resolve on 2026-12-31, with implied odds down 1.0 percentage point from the prior reading.
U.S. stocks ended mixed on Monday as large technology names came under pressure while investors tracked signs of progress in U.S.-Iran peace talks. The Dow Jones Industrial Average rose more than 0.2%, while the S&P 500 fell nearly 0.4% and the Nasdaq Composite dropped 1.3% after the prior session’s holiday closure. SpaceX shares fell for a third straight day, and Alphabet swung 5% lower as other major tech stocks also declined. Iran said there had been “encouraging progress” in talks with the U.S. in Switzerland and that the sides agreed to a roadmap toward a final deal within 60 days, easing concerns tied to President Trump’s threat of strikes if Tehran does not rein in Hezbollah’s actions against Israel. Oil prices fell, with Brent near $78 a barrel and WTI near $74, as investors also absorbed news of Alan Greenspan’s death at age 100 and looked ahead to the May PCE inflation report.
Polymarket “Largest IPO by Market Cap in 2026?” Hits $3.31M Volume as SpaceX Odds Dip to 85.5% (xAI 25.5%, Anthropic 14.
On Polymarket, the multi-outcome “Largest IPO by market cap in 2026?” contract had matched volume of $3,311,295 at the time of the snapshot, with SpaceX still dominant despite a small pullback. SpaceX was priced at 85.5% Yes versus 14.5% No, down from 86.5% previously. The next tier sat well behind: xAI traded at 25.5% Yes / 74.5% No and Anthropic at 14.0% Yes / 86.0% No, while OpenAI was priced at 1.4% Yes / 98.6% No. The wide gap between SpaceX and the rest suggests traders remain heavily skewed toward SpaceX as the most likely top 2026 IPO by market cap, even as marginal hedging shows up in the day-to-day moves.
Any follow-through in SpaceX-linked pricing and liquidity on Polymarket, including whether the SpaceX Yes side can regain the prior 86.5% level ahead of the 2026-12-31 resolution date.
Beyond IPO Markets: U.S.-Iran Peace Talks, Oil Prices, and Other Macro Contracts Polymarket Traders Are Watching
Beyond equity and IPO-linked wagers, Polymarket traders are also leaning into macro pricing, with $16,478,380 in matched volume on “Fed Decision in July?” showing “No change” at 72.5%. Longer-dated rate expectations are even more lopsided: “How many Fed rate cuts in 2026?” has drawn $37,554,949 in volume with “0 (0 bps)” leading at 80.25%. At the same time, the curve of outcomes remains contested, with “Fed rate hike in 2026?” pricing “Yes” at 57.5% on $2,763,828 in volume.
By the Numbers
- Platform: Polymarket
- Market: Largest IPO by market cap in 2026?
- Contract type: Price strike ladder: each rung has separate Yes/No; Yes means the spot price is above that USD strike at settlement.
- Resolution window: Dec 31, 2026 (UTC)
- Status: Active (open for trading)
- Volume: ~$3,311,295
- 24h change: +0.0 pp
Top strike rungs
| Strike | Yes | No |
|---|---|---|
| SpaceX | 85.5% | 14.5% |
| xAI | 25.5% | 74.5% |
| Anthropic | 14.0% | 86.0% |
| OpenAI | 1.4% | 98.6% |
+9 more strikes not shown
Related Markets
- Fed Decision in July? — No change 72%
- How many Fed rate cuts in 2026? — 0 (0 bps) 80%
- Fed rate hike in 2026? — Yes 58%