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Expected Value Calculator
What a position is worth given your estimated probability vs the market price.
Shares
200.0
Expected value
+$20.00
Expected ROI
+20.0%
EV = stake × (your probability ÷ price − 1). Positive means the price underrates your probability.
Want the probabilities filled in for you?
The Predite scanner estimates probabilities with AI across live markets and flags the edges automatically.
Start scanning →Educational tools — not financial advice. Prediction markets involve risk of loss.