The case shiller housing index measures the price of housing against a basket of other goods. This index has been around since the late 1800s and historically throughout that period housing has kept up with inflation. The price of housing has never risen faster than inflation, and has stayed remarkably flat for 100 years. If you watch the martenson link he explains this all brilliantly. Personally I think we will see below 100 on the case shiller index in a few years. I think the downside of going short is limited, and has decent upside. Alot of things are going up/down in this market, but the case shiller is headed straight down. If people can't get loans, how is this supposed to go up? Honestly one of the most clear cut and understandable trades I have ever seen. http://www.chrismartenson.com/crash-course/chapter-15-bubbles http://en.wikipedia.org/wiki/Case-Shiller_index You can also bet on individual cities using futures. Now that is some seriously heavy trending people.