The concept of a weather market is a well-subscribed orthodoxy in agriculture and a factor in energy markets. First quarter gross domestic product (GDP) data will be impacted in large part by recent weather effects, similarly to last year when January 2014 was record cold. It is now officially just five days before spring. We are coming off what was the coldest February since 1979 for most people in the U.S. In agriculture, the concept of a weather market is a well-subscribed orthodoxy as crops don't get planted or harvested in floods nor do they develop and grow in droughts, etc. It is also a recognized factor in energy markets. Extreme cold can push up winter heating oil prices, while extreme heat can impact electricity demand for air con...