| PREDICTIONS | CURRENT VALUE | TODAY |
| Liberal Party | $57.29/ $57.29 | (closed) |
| Conservative Party | $26.36/ $26.36 | (closed) |
| New Democratic Party | $11.76/ $11.76 | (closed) |
| Green Party | $3.66/ $3.66 | (closed) |
| Other | $0.91/ $0.91 | (closed) |
The challenge in this market is to predict which federal party wins the Guelph by-election. The final vote, according to Elections Canada, will be used to determine the winning party. The market will close prior to the end of voting on the election day.
The Liberal Party wins the Guelph federal by-election to be held on September 8, 2008.
The Conservative Party wins the Guelph federal by-election to be held on September 8, 2008.
The New Democratic Party wins the Guelph federal by-election to be held on September 8, 2008.
The Green Party wins the Guelph federal by-election to be held on September 8, 2008.
A candidate other than one running for the listed parties wins the Guelph federal by-election to be held on September 8, 2008.