Assuming the preliminary results are accurately indicating the final results,
Tradesports did quite well at predicting the elections (except for a few hours
on Tuesday afternoon when it mistakenly reacted to exit polls). It's Monday
evening prices correctly indicated which presidential candidate would win
each state. And it did a good job of indicating which states were closest
(saying Iowa and Ohio were the least certain).
Judging by the home page on what seemed to be the best known site devoted
to tracking the polls (electoral-vote.com), the final polls got Ohio, Florida,
Iowa, Hawaii wrong and predicted a tie in New Mexico and New Hampshire. Other
ways of interpreting the polls probably did better, but I didn't track them.
Even using the Tradesports prices from a month before the election
(October 2), Tradesports looks better than the final polls, getting only
Wisconsin, New Mexico, and New Hampshire wrong, and showing Iowa and New
Hampshire as the closest states.
Tradesports also had several contracts which did a good job of predicting
the total electoral vote count, predicting a month in advance that Bush
would get just under 300 electoral votes, and predicting on Monday evening
that he would get about 276 electoral votes.
Tradesports predicted all but one senate race correctly. It was wrong on
Alaska (which it said was the hardest to call). It looks like the pollsters
called that one correctly. I haven't checked whether pollsters missed any
of the other Senate races.
Here are some of the prices I've saved, taken at approximately 9pm Pacific
time on the indicated dates:
Date Last Bid Ask Contract Description
041101 97.3 97.1 98.0 G W Bush to gain ON or OVER 150 Electoral Votes
041101 92.0 91.5 92.0 G W Bush to gain ON or OVER 200 Electoral Votes
041101 71.5 71.5 72.0 G W Bush to gain ON or OVER 250 Electoral Votes
041101 23.2 23.2 23.5 G W Bush to gain ON or OVER 300 Electoral Votes
041101 9.0 7.6 9.2 G W Bush to gain ON or OVER 350 Electoral Votes
041101 3.9 2.6 4.0 G W Bush to gain ON or OVER 400 Electoral Votes
041101 2.0 1.7 3.0 G W Bush to gain ON or OVER 450 Electoral Votes
041101 51.2 51.2 53.0 George W Bush to receive the most Popular Votes
041101 48.9 46.2 48.9 John F Kerry to receive the most Popular Votes
041101 276 266 285 Number of Electoral Votes won by George W Bush
041101 53.4 53.2 53.4 George W Bush is re-elected as United States President.
041101 47.5 47.5 47.8 John Kerry to be elected as United States President
041101 97.3 95.3 99.6 G W Bush to win the electoral votes of Alabama
041101 97.0 95.0 99.8 G W Bush to win the electoral votes of Alaska
041101 92.0 91.0 92.5 G W Bush to win the electoral votes of Arizona
041101 85.0 81.1 85.0 G W Bush to win the electoral votes of Arkansas
041101 3.6 2.9 3.6 G W Bush to win the electoral votes of California
041101 76.0 75.3 76.0 G W Bush to win the electoral votes of Colorado
041101 3.0 1.2 5.5 G W Bush to win the electoral votes of Connecticut
041101 7.9 5.3 8.0 G W Bush to win the electoral votes of Delaware
041101 55.9 55.5 55.9 G W Bush to win the electoral votes of Florida
041101 97.0 97.0 99.6 G W Bush to win the electoral votes of Georgia
041101 26.8 26.2 28.4 G W Bush to win the electoral votes of Hawaii
041101 99.0 96.0 99.9 G W Bush to win the electoral votes of Idaho
041101 6.0 3.2 6.0 G W Bush to win the electoral votes of Illinois
041101 95.0 95.4 99.9 G W Bush to win the electoral votes of Indiana
041101 51.9 51.9 52.0 G W Bush to win the electoral votes of Iowa
041101 96.0 96.1 99.6 G W Bush to win the electoral votes of Kansas
041101 95.5 95.4 99.5 G W Bush to win the electoral votes of Kentucky
041101 95.0 95.0 99.0 G W Bush to win the electoral votes of Louisiana
041101 6.0 4.0 6.0 G W Bush to win the electoral votes of Maine
041101 5.0 3.1 5.0 G W Bush to win the electoral votes of Maryland
041101 2.0 0.4 3.0 G W Bush to win the electoral votes of Massachusetts
041101 22.0 22.0 23.5 G W Bush to win the electoral votes of Michigan
041101 27.0 20.0 29.0 G W Bush to win the electoral votes of Minnesota
041101 97.0 97.0 97.8 G W Bush to win the electoral votes of Mississippi
041101 87.2 87.1 91.6 G W Bush to win the electoral votes of Missouri
041101 98.0 98.0 99.9 G W Bush to win the electoral votes of Montana
041101 96.5 95.3 99.5 G W Bush to win the electoral votes of Nebraska
041101 74.9 74.0 75.0 G W Bush to win the electoral votes of Nevada
041101 31.5 31.5 34.0 G W Bush to win the electoral votes of New Hampshire
041101 13.0 11.1 14.0 G W Bush to win the electoral votes of New Jersey
041101 60.0 55.0 60.0 G W Bush to win the electoral votes of New Mexico
041101 2.1 1.7 3.1 G W Bush to win the electoral votes of New York
041101 95.0 92.1 95.1 G W Bush to win the electoral votes of North Carolina
041101 95.2 96.3 99.0 G W Bush to win the electoral votes of North Dakota
041101 55.0 51.4 55.0 G W Bush to win the electoral votes of Ohio
041101 99.6 95.0 99.6 G W Bush to