Refers to a single place prize, not the entire prize pool. If a prize is not monetary, such as Magic cards, I'll use my best estimate as to the item's market value.

Just needs to be the officially announced prize; if the top 8 decides to split it so the winner gets less, that won't prevent the market from resolving to YES.

If this has already happened prior to market creation, that's not included. (Though I'd be curious to know what tournament it was.)