Prediction Markets Morning — 2026-10-17
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
Will Katie Zacharia be out as White House Press Secretary before Jan 1, 2027? moved +55.0 pts to 99.0%, the most significant liquidity-adjusted move on Kalshi. LoL: BNK FEARX vs Team WE - Game 2 Winner moved +40.5 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
Will Katie Zacharia be out as White House Press Secretary before Jan 1, 2027? (+55.0 pts to 99.0%); Will it rain in Lexington on Oct 17, 2026? (+72.0 pts to 99.0%); Will Katie Zacharia be out as White House Press Secretary before Oct 24, 2026? (+87.5 pts to 97.5%) lead the ranking by movement significance, which weights the size of each move by volume, liquidity and spread.
| # | Market | Probability | 24h move | Significance | Volume |
|---|---|---|---|---|---|
| 1 | Will Katie Zacharia be out as White House Press Secretary before Jan 1, 2027? | 99.0% | +55.0 pts | 100 | $125K |
| 2 | Will it rain in Lexington on Oct 17, 2026? | 99.0% | +72.0 pts | 100 | $21,861 |
| 3 | Will Katie Zacharia be out as White House Press Secretary before Oct 24, 2026? | 97.5% | +87.5 pts | 100 | $179K |
| 4 | Will it rain in New York City on Oct 17, 2026? | 99.0% | +43.0 pts | 99 | $25,921 |
| 5 | Will it rain in Trenton on Oct 17, 2026? | 99.0% | +49.0 pts | 99 | $12,860 |
| 6 | Will Katie Zacharia be out as White House Press Secretary before Dec 1, 2026? | 99.0% | +59.0 pts | 98 | $247K |
| 7 | Will it rain in Trenton between Oct 17 and Oct 18, 2026? | 99.0% | +47.0 pts | 97 | $5,128 |
| 8 | VisionQuest Rotten Tomatoes score? | 97.0% | +62.0 pts | 96 | $3,230 |
| 9 | Will it rain in New York City between Oct 17 and Oct 18, 2026? | 99.0% | +42.0 pts | 96 | $7,019 |
| 10 | Klara and the Sun Rotten Tomatoes score? | 82.5% | +46.5 pts | 95 | $996 |
Top Polymarket Movers
LoL: BNK FEARX vs Team WE - Game 2 Winner (+40.5 pts to 99.9%); LoL: BNK FEARX vs Team WE - Game 3 Winner (−59.5 pts to 0.1%); LoL: BNK FEARX vs Team WE - Game 1 Winner (+41.5 pts to 99.9%) lead the ranking by movement significance, which weights the size of each move by volume, liquidity and spread.
| # | Market | Probability | 24h move | Significance | Volume |
|---|---|---|---|---|---|
| 1 | LoL: BNK FEARX vs Team WE - Game 2 Winner | 99.9% | +40.5 pts | 100 | $879K |
| 2 | LoL: BNK FEARX vs Team WE - Game 3 Winner | 0.1% | −59.5 pts | 100 | $1.36M |
| 3 | LoL: BNK FEARX vs Team WE - Game 1 Winner | 99.9% | +41.5 pts | 100 | $789K |
| 4 | Wuhan Tennis Open: Sonay Kartal vs Jelena Ostapenko | 99.9% | +45.5 pts | 100 | $399K |
| 5 | Shanghai Rolex Masters: Alexander Zverev vs Alejandro Davidovich Fokina | 8.5% | −66.0 pts | 100 | $811K |
| 6 | LoL: BNK FEARX vs Team WE (BO5) - Demacia Cup Global Invitational Playoffs | 84.5% | +17.0 pts | 100 | $1.15M |
| 7 | Manchester City FC vs. Ipswich Town FC: O/U 3.5 | 54.5% | +7.0 pts | 92 | $519K |
| 8 | West Indies Tour of India T20s: India vs West Indies | 60.5% | −7.5 pts | 69 | $154K |
| 9 | Will Chelsea FC win on 2026-10-17? | 37.5% | −6.0 pts | 66 | $636K |
| 10 | Will oil be below $85 on November 2 and the Democrats win the Senate? | 6.8% | −4.8 pts | 49 | $67,688 |
Largest Trades
The largest recorded execution was $448K on Polymarket in Will Eintracht Frankfurt win on 2026-10-16?, followed by $213K in LoL: FURIA Esports vs Cloud9 (BO5) - Worlds Play-In. 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 Eintracht Frankfurt win on 2026-10-16? | YES | $448K | 100% | 16:33 ET | — |
| Polymarket | LoL: FURIA Esports vs Cloud9 (BO5) - Worlds Play-In | NO | $213K | 92% | 17:34 ET | −1.5 pts |
| Polymarket | LoL: MVK Esports vs Karmine Corp (BO5) - Worlds Play-In | NO | $167K | 100% | 16:48 ET | — |
| Polymarket | LoL: FURIA Esports vs Cloud9 (BO5) - Worlds Play-In | YES | $152K | 61% | 19:39 ET | +3.0 pts |
| Polymarket | LoL: FURIA Esports vs Cloud9 - Game 4 Winner | YES | $131K | 47% | 19:44 ET | 0.0 pts |
| Kalshi | Who will win Los Angeles Mayoral Election? | NO | $55,257 | 53% | 19:03 ET | 0.0 pts |
| Kalshi | Washington wins | YES | $50,429 | 99% | 23:32 ET | +0.5 pts |
| Kalshi | Washington wins | YES | $50,429 | 99% | 23:32 ET | +0.5 pts |
| Kalshi | Washington wins | YES | $50,429 | 99% | 23:32 ET | +0.5 pts |
| Kalshi | Purdue wins | NO | $50,429 | 99% | 23:32 ET | −0.5 pts |
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 16.6%, a 3.0 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% | 16.6% | 3.0 pts |
| Will Mark Kelly be the Democratic Presidential nominee in 2028 | B | 3.8% | 1.8% | 2.0 pts |
| Will Gavin Newsom be the Democratic Presidential nominee in 2028 | B | 13.5% | 15.3% | 1.9 pts |
| Will Andy Beshear be the Democratic Presidential nominee in 2028 | B | 5.0% | 3.3% | 1.7 pts |
| Will Jon Ossoff be the Democratic Presidential nominee in 2028 | B | 12.5% | 14.1% | 1.6 pts |
| Will Michelle Obama be the Democratic Presidential nominee in 2028 | B | 1.6% | 0.3% | 1.4 pts |
| Will J.B. Pritzker be the Democratic Presidential nominee in 2028 | B | 2.5% | 1.3% | 1.3 pts |
| Will Josh Shapiro be the Democratic Presidential nominee in 2028 | B | 4.5% | 5.7% | 1.1 pts |
| Will Bernie Sanders be the Democratic Presidential nominee in 2028 | B | 0.4% | 1.5% | 1.1 pts |
| Will Raphael Warnock be the Democratic Presidential nominee in 2028 | B | 2.9% | 1.8% | 1.0 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.
- Will Katie Zacharia be out as White House Press Secretary before Jan 1, 2027? Most significant Kalshi move
- LoL: BNK FEARX vs Team WE - Game 2 Winner Most significant Polymarket move
- Will Alexandria Ocasio-Cortez be the Democratic Presidential nominee in 2028 Largest cross-venue disagreement
- Will Eintracht Frankfurt win on 2026-10-16? Largest trade of the session
- Will it rain in Lexington on Oct 17, 2026? 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 17, 08:06 ET ET (2026-10-17 12:06 UTC). Evidence hash 4af9d6bce3ef2e8c.