A new iPredict stock

iPredict have launched a new stock. It is will Labour's party vote be 10% or greater than the Greens. They explain:

This contract pays $1 if the vote exceeds the Green party vote by at least 10% of the total party vote. For example, this contract will pay $1 if Labour and Greens receive 24% and 13% of the party vote, respectively, and will pay $0 if Labour and Greens receive 23% and 14% of the party vote, respectively.

Labour are down at 24.5% in the poll and so the Greens only need another 1.5% for the stock to pay out $1.

They have also launched stocks on whether the gap will be over 12.5% and 15.0%.