Prediction markets get interesting when compared to polls about the same topics -- Howard "Having said all of that, I’ve finally found a use for Intrade. The website is a very convenient way to quantify conventional wisdom. According to Intrade on a recent (Monday) night, President Obama had precisely a 58.8 percent chance of getting reelected. Apparently, his odds had dropped about six-tenths of 1 percentage point in the previous day. This decline is presumably a result of the crowd’s assessment of the impact of Obama’s endorsement of same-sex marriage (as if that will really have an impact six months from now). On that Monday, the Intraders saw Republicans as having a 74.9 percent chance of keeping their House majority. Democrats had a 29.8 percent chance of regaining the chamber. These predictions strain credibility a bit, as the odds add up to more to than 100 percent, but that’s another matter."