The Parlay Trap
A parlay is not a winning ticket waiting to happen. It is two compounding penalties stacked on top of each other. Probability decays multiplicatively and the bookmaker's hold compounds at every leg, which is why the parlay is the most profitable product in the building.
Episode 04 of the WagerBird Methodology series. Watch on YouTube →
The Worked Example
Three coin flips. The probability of hitting all three is 50% times 50% times 50%, 12.5%, or one in eight. That is the cascade. Now add the second penalty. The true fair payout on a three-leg parlay of coin flips is +700. The actual -110 parlay payout is around +595. The bookmaker keeps about thirteen cents of every dollar wagered across the eight outcomes. That is the highest hold on the menu, and the reason the parlay tab gets the brightest lights at every sportsbook.
The WagerBird Answer
Every WagerBird pick is published as an independent confidence score from 25 to 100. The bettor composes their own slate and sizes each position on its own merit. The math of compounding then works for you across a season instead of against you on a single ticket.
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