Prediction Markets Morning — 2026-10-04
What moved overnight, where Kalshi and Polymarket disagree, and the trades and conversation around them.
What moved overnight, where Kalshi and Polymarket disagree, and the trades and conversation around them.
The Overnight Picture
What will Donald Trump say during Midterm Rally in Vandalia, Ohio originally scheduled for October 3, 2026? moved +74.0 pts to 99.0%, the most significant liquidity-adjusted move on Kalshi. Valorant: LOUD vs Global Esports (BO3) - VCT Champions Group B moved +44.5 pts to 99.9%, the most significant liquidity-adjusted move on Polymarket. No matched contracts show gaps of 5 pts or more.
Top Kalshi Movers
What will Donald Trump say during Midterm Rally in Vandalia, Ohio originally scheduled for October 3, 2026? (+74.0 pts to 99.0%); Las Vegas Lights wins (+58.0 pts to 99.0%); What will Donald Trump say during Midterm Rally in Vandalia, Ohio originally scheduled for October 3, 2026? (+63.0 pts to 99.0%) lead the ranking by movement significance, which weights the size of each move by volume, liquidity and spread.
Top Polymarket Movers
Valorant: LOUD vs Global Esports (BO3) - VCT Champions Group B (+44.5 pts to 99.9%); Will Max Verstappen win the 2026 F1 Bahrain Grand Prix? (+42.4 pts to 99.9%); China Open: Daria Snigur vs Taylah Preston (+39.0 pts to 99.9%) lead the ranking by movement significance, which weights the size of each move by volume, liquidity and spread.
Largest Trades
The largest recorded execution was $338K on Polymarket in Will Spain win on 2026-10-03?, followed by $215K in Atlanta Braves vs. Los Angeles Dodgers. Size and price impact are measured separately; the tables show the price five minutes after each trade.
| Venue | Market | Side | Notional | Price | Time (ET) | 5m move |
|---|---|---|---|---|---|---|
| Polymarket | Will Spain win on 2026-10-03? | YES | $338K | 92% | 13:59 ET | — |
| Polymarket | Atlanta Braves vs. Los Angeles Dodgers | NO | $215K | 86% | 17:15 ET | −1.0 pts |
| Polymarket | Atlanta Braves vs. Los Angeles Dodgers | NO | $215K | 86% | 17:16 ET | −1.0 pts |
| Polymarket | UFC 332: Natalia Silva vs. Wang Cong (Women's Flyweight, Main Card) | YES | $195K | 65% | 22:09 ET | — |
| Polymarket | Washington vs. USC | NO | $178K | 71% | 22:32 ET | −15.0 pts |
| Kalshi | Will Denver win the 2027 Pro Football Championship? | NO | $160K | 96% | 23:21 ET | 0.0 pts |
| Kalshi | Will Republicans win the House in 2026? | NO | $53,181 | 92% | 09:21 ET | −0.4 pts |
| Kalshi | Will Gretchen Whitmer be the Democratic Presidential nominee in 2028? | NO | $39,832 | 100% | 00:16 ET | — |
| Kalshi | USC wins by over 7.5 points | YES | $39,652 | 49% | 19:15 ET | 0.0 pts |
| Kalshi | Ohio St. wins | YES | $32,027 | 99% | 17:59 ET | — |
Where Kalshi and Polymarket Disagree
Will Alexandria Ocasio-Cortez be the Democratic Presidential nominee in 2028 shows the widest disagreement: Kalshi 13.5% versus Polymarket 17.8%, a 4.3 pt gap. Gaps can reflect rule differences, fees and venue access as well as differing views.
| Contract | Grade | Kalshi | Polymarket | Gap |
|---|---|---|---|---|
| Will Alexandria Ocasio-Cortez be the Democratic Presidential nominee in 2028 | B | 13.5% | 17.8% | 4.3 pts |
| Will Gavin Newsom be the Democratic Presidential nominee in 2028 | B | 13.5% | 17.2% | 3.6 pts |
| Will Andy Beshear be the Democratic Presidential nominee in 2028 | B | 5.7% | 3.0% | 2.6 pts |
| Will Mark Kelly be the Democratic Presidential nominee in 2028 | B | 4.3% | 2.6% | 1.6 pts |
| Will Michelle Obama be the Democratic Presidential nominee in 2028 | B | 1.5% | 0.3% | 1.2 pts |
| Will Josh Shapiro be the Democratic Presidential nominee in 2028 | B | 4.7% | 5.9% | 1.2 pts |
| Will Jon Ossoff be the Democratic Presidential nominee in 2028 | B | 16.5% | 15.4% | 1.1 pts |
| Will James Talarico be the Democratic Presidential nominee in 2028 | B | 3.6% | 2.5% | 1.1 pts |
| Will Rahm Emanuel be the Democratic Presidential nominee in 2028 | B | 2.6% | 1.7% | 1.0 pts |
| Will J.B. Pritzker be the Democratic Presidential nominee in 2028 | B | 2.1% | 1.3% | 0.8 pts |
Cross-Market Opportunities
No Grade A pair currently shows a positive theoretical edge from executable prices.
Five Markets to Watch Today
Each pick below is selected by a different signal: movement significance, cross-venue disagreement and trade size.
- What will Donald Trump say during Midterm Rally in Vandalia, Ohio originally scheduled for October 3, 2026? Most significant Kalshi move
- Valorant: LOUD vs Global Esports (BO3) - VCT Champions Group B Most significant Polymarket move
- Will Alexandria Ocasio-Cortez be the Democratic Presidential nominee in 2028 Largest cross-venue disagreement
- Will Spain win on 2026-10-03? Largest trade of the session
- Las Vegas Lights wins Runner-up significant move
Methodology and Timestamp
Tables are computed from Kalshi and Polymarket public market data at the snapshot time. Movement is in percentage points; significance, impact and evidence scores are described on the methodology page.
Snapshot frozen Oct 4, 08:04 ET ET (2026-10-04 12:04 UTC). Evidence hash 3969d815c02aa6da.