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Documentation Index

Fetch the complete documentation index at: https://polymarketus.mintlify.app/llms.txt

Use this file to discover all available pages before exploring further.

Each market on Polymarket US asks a question about a future event. Every market has two outcomes: Yes and No.
  • Yes pays $1 if the event happens
  • No pays $1 if the event does not happen
Only one side pays out. The other settles at $0.

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Buying Yes vs Selling No

Buying Yes and selling No express the same view:
  • Buying Yes means you think the event will happen
  • Selling No means the same thing — you expect the event to happen
They are two ways of taking the same position. Choose the side you prefer.
Shorting is covered in the Advanced lane. See the Shorting chapter for details.

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Prices Always Add Up to $1

Yes and No prices always add up to $1. If Yes trades at $0.70, No trades at $0.30. These prices reflect the market’s implied probability of each outcome.

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Key Points

  • Buying Yes and selling No express the same view
  • The winning side pays $1 and the losing side settles at $0
  • Yes and No prices always add up to $1
  • Choose the side you prefer