Question 1

What factors influence the odds for the American League Champion?

Accepted Answer

Team performance during the regular season, player injuries, and trades significantly affect the odds. Additionally, historical performance and head-to-head matchups can sway market predictions.

Question 2

How do prediction markets determine the favorite for the championship?

Accepted Answer

Prediction markets aggregate real-time betting data from participants, reflecting collective sentiment on team strengths and weaknesses. As the season progresses, odds adjust based on game outcomes and other relevant developments.

Question 3

When is the American League Champion determined?

Accepted Answer

The American League Champion will be decided at the conclusion of the postseason, typically in late October or early November. The exact date may vary depending on the playoff schedule.

Question 4

What is "American League Champion" and why does it matter?

Accepted Answer

American League Champion is a prediction market event currently tracked across 2 platforms (Kalshi, Polymarket). Tampa Bay Rays leads at 51% implied probability, making it the market favorite. Other contenders include Tampa Bay Rays at 51%, Los Angeles Angels at 50%, Los Angeles Angels at 50%.

Question 5

What is moving the odds on "American League Champion"?

Accepted Answer

Tampa Bay Rays currently leads at 51% implied probability. Behind Tampa Bay Rays, Tampa Bay Rays at 51% and Los Angeles Angels at 50% and Los Angeles Angels at 50% are the next closest contenders. The 98.7% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.

Question 6

What are the current odds for "American League Champion" across platforms?

Accepted Answer

Here are the latest odds across Kalshi, Polymarket: Tampa Bay Rays: 12¢ on Kalshi, 89¢ on Polymarket. Tampa Bay Rays: 12¢ on Kalshi, 89¢ on Polymarket. Los Angeles Angels: 1¢ on Kalshi, 100¢ on Polymarket. Los Angeles Angels: 1¢ on Kalshi, 100¢ on Polymarket. The 98.7% spread across platforms highlights where markets disagree — a gap traders can exploit by buying low on one platform and selling high on another.

Question 7

What does it mean that Tampa Bay Rays is at 51%?

Accepted Answer

A price of 51¢ means the market estimates a 51% probability that Tampa Bay Rays will be the outcome. Buying one share at 51¢ pays out $1.00 if correct — a 96% return — or $0 if wrong. This is the core mechanic of prediction markets: the price directly reflects the crowd's probability estimate.

Platform	Implied %	Yes — Bid / Ask		No — Bid / Ask
Kalshi	11.5%	11¢	12¢	88¢	89¢
Polymarket	89.5%	89¢	90¢	11¢	11¢

Platform	Implied %	Yes — Bid / Ask		No — Bid / Ask
Kalshi	11.5%	11¢	12¢	88¢	89¢
Polymarket	89.5%	89¢	90¢	11¢	11¢

Platform	Implied %	Yes — Bid / Ask		No — Bid / Ask
Kalshi	6.5%	6¢	7¢	93¢	94¢
Polymarket	94.5%	94¢	95¢	5¢	6¢

American League Champion

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Market Rulebook: American League Champion