| PREDICTIONS | CURRENT VALUE | TODAY |
| Liberal Party | $75.65/ $75.65 | (closed) |
| New Democratic Party | $16.09/ $16.09 | (closed) |
| Conservative Party | $4.12/ $4.12 | (closed) |
| Green Party | $1.65/ $1.65 | (closed) |
| The BLOC | $1.65/ $1.65 | (closed) |
| Other | $0.82/ $0.82 | (closed) |
The challenge for this market is to predict the winner of the federal by-election being held on September 8 for the Canadian constituency of Westmount. The final result will be determined through use of the final result as listed on the Elections Canada website. The market will close prior to the end of voting.
The Liberal Party wins the federal by-election to be held on September 8 for Westmount constituency.
The New Democratic Party wins the federal by-election to be held on September 8 for Westmount constituency.
The Conservative Party wins the federal by-election to be held on September 8 for Westmount constituency.
The Green Party wins the federal by-election to be held on September 8 for Westmount constituency.
The BLOC wins the federal by-election to be held on September 8 for Westmount constituency.
A candidate representing none of the parties listed wins the federal by-election to be held on September 8 for Westmount constituency.