38% — Chicago Stars FC vs. Portland Thorns FC - More Markets
Polymarket 41% · Kalshi 36% · 16 contracts · $6K volume · low confidence
Updated 2026-05-03 16:14:46 UTC

Cross-venue gap: 5pp (Polymarket higher)

Why this matters:
This probability reflects the market's assessment that Portland Thorns FC will defeat Chicago Stars FC, currently priced at 42 percent across prediction markets. The estimate rests on Portland's home-field advantage and recent competitive form, balanced against Chicago's capability as a regular-season competitor. Liquidity is concentrated on Kalshi's direct winner market ($385 in 24-hour volume), while Polymarket shows broader interest in ancillary soccer outcomes. The 9-percentage-point gap between venues suggests some disagreement about Portland's likelihood, possibly reflecting different trader bases or contract specifications. Resolution will occur when the match concludes, determining whether Portland wins, Chicago wins, or the result is a draw. Current positioning leaves room for movement based on team news, injury reports, or tactical shifts announced closer to kickoff.

Key factors:
- Kalshi's single contract prices Portland at 50 percent while Polymarket's 19 contracts average 41 percent, indicating structural disagreement between venues
- Chicago Stars FC's recent performance record and goal-differential trends versus Portland Thorns FC's current form and home-field historical win rate
- Match venue (Portland home-field advantage typically correlates with 3-5 percentage-point probability shifts in MLS outcomes)
- Team roster availability and injury status as of match week, particularly for starting forwards or defensive anchors
- The gap between direct winner odds (42 percent) and correlated market indicators like both-teams-to-score pricing (65 percent) suggests either defensive vulnerabilities or offensive capability concerns

Contracts:
- Will LOUD win the Vivo Keyd Stars vs. LOUD League of Legends match?: LOUD — 42¢ Kalshi $2K (weight 9%)
- Chicago vs Portland Thorns Winner?: Portland Thorns — 61¢ Kalshi $902 (weight 8%)
- Will Vivo Keyd Stars win the Vivo Keyd Stars vs. LOUD League of Legends match?: Vivo Keyd Stars — 57¢ Kalshi $685 (weight 8%)
- Will the number of unemployment rate exceeds 10% (monthly BLS); S&P 500 declines more than 30% from its closing level on Issuance; Zillow Home Value Index declines more than 10% YoY in any of: NYC, LA, San Francisco, Chicago, Houston, Phoenix; labor share of gross domestic income (GDI) first-release value for any quarter falls below 50%; CPI-U (All items, not seasonally-adjusted) YoY falls below 0% in any monthly release during before July 2028 be above 2?: Yes — 23¢ Kalshi $668 (weight 8%)
- FC Midtjylland vs. Viborg FF - More Markets: Viborg FF (-2.5) — 3¢ Polymarket $317 (weight 7%)
- Liaoning Tieren FC vs. Chengdu Rongcheng FC - More Markets: Liaoning Tieren FC (-2.5) — 3¢ Polymarket $306 (weight 7%)
- FK Bodø/Glimt vs. Molde FK - More Markets: FK Bodø/Glimt (-2.5) — 32¢ Polymarket $206 (weight 7%)
- FK Bodø/Glimt vs. Molde FK - More Markets: FK Bodø/Glimt (-1.5) — 53¢ Polymarket $204 (weight 7%)
- ... and 8 more

Cite as: "38% per prediction markets (SimpleFunctions, May 2026)"
Canonical: https://simplefunctions.dev/answer/chicago-stars-fc-vs-portland-thorns-fc-more-markets
Full data: https://simplefunctions.dev/api/public/query?q=Chicago%20Stars%20FC%20vs.%20Portland%20Thorns%20FC%20-%20More%20Markets
Provider: SimpleFunctions — https://simplefunctions.dev