Patent ID: 7341517

Claim:
A method comprising: determining a spread for a variable associated with a wagerable event, the spread comprising a value above the variable associated with the wagerable event and a value below the variable associated with the wagerable event; displaying an interface screen comprising: the wagerable event, the value above the variable and the value below the variable, and at least one element for a user to submit a buy wager at the value above the variable and a sell wager at the value below the variable, wherein the buy wager has a payout and a loss determined based at least on a difference between a value of the variable at a maturity of the buy wager and the value above the variable, and the sell wager has a payout and a loss determined based at least on a difference between the value of the variable at a maturity of the sell wager and the value below the variable; receiving a request for one of the buy wager and the sell wager, the request comprising a stake, one of the value above the variable and the value below the variable, and a collar on potential losses on the one of the buy wager and the sell wager; determining a cap on potential winnings on the one of the buy wager and the sell wager based at least on the collar; and notifying the user whether the one of the buy wager and the wager has been accepted.