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World Series 2026 champion: Polymarket vs Kalshi odds

Updated October 29, 2026 · refreshed twice a day

Polymarket prices Milwaukee Brewers at 97.4% and Kalshi at 98.4%. The widest gap is on Milwaukee Brewers: 97.4% on Polymarket vs 98.4% on Kalshi (1.0 points). Prices checked October 29, 2026, before fees.

OutcomePolymarketKalshiGapCheaper to buy Yes
Milwaukee Brewers97.4%98.4%-1.0 ptsPolymarket
Tampa Bay Rays2.7%1.7%+1.0 ptsKalshi

Gap = Polymarket minus Kalshi, in percentage points, before fees. Polymarket odds page for this event · Kalshi odds for this event on Kalshi View

Frequently asked questions

Is Polymarket or Kalshi cheaper for World Series 2026 champion?

Polymarket prices Milwaukee Brewers at 97.4% and Kalshi at 98.4%. The widest gap is on Milwaukee Brewers: 97.4% on Polymarket vs 98.4% on Kalshi (1.0 points). Prices checked October 29, 2026, before fees.

Why do Polymarket and Kalshi prices differ?

They are separate order books with different traders, fees and access rules, so the same outcome can trade a few points apart. Fees, deposit and withdrawal costs and settlement rules can erase a small gap.

Other events priced on both: Fed decision in December 2026 · Which party wins the House in 2026 · Which party wins the Senate in 2026 · Which party wins the 2028 presidential election · Pro football champion (2026–27 season) · NBA champion 2027 · Stanley Cup 2027 · Champions League 2027 winner · Will Anthropic or OpenAI IPO first · US recession by the end of 2026. Polymarket View is independent and not affiliated with Polymarket or Kalshi. Educational information, not financial advice. All pairs

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