December 27, 2007 | CanoeThe UNIVERSITY OF IOWA'S TIPPIE COLLEGE OF BUSINESS runs a Web-based real-money futures market where investors buy and sell shares on candidates. Spending from $5 to $500, about 2,000 traders -- half in Iowa and half from all over the world -- provide a unique window on the race. Updated every 15 minutes, it's a timely barometer of what's happening on the campaign trail. Since it started in 1988, it's beaten public opinion polls 76 percent of the time. Canoe is a Canadian news organization; the story also appeared on the Web sites of several Canadian radio stations.