 If the Jets win, he collects $900 on his bet on the Jets and pays out approximately $884 on the bet he laid against the Jets.If the Jets lose, he loses his $1000 stake on the Jets but keeps the $1016 stake on the bet he laid against the Jets.Either way, the "trader" makes a $16 profit and he will pay a commission only on that profit (usually not more than 5% or 80 cents in this example) for a net profit of $15.20 regardless of the result.