Experts pick out markets that are too hot in the US

San Francisco's housing market has grown so unaffordable that some experts say the market is already in a bubble and it's not the only market in the United States that they are concerned about. A third of the experts surveyed in the latest Zillow Home Price Expectations Survey said the San Francisco housing market is in a bubble and another 20% believe the market is at risk for bubble conditions within the next year. The survey, sponsored quarterly by Zillow and conducted by Pulsenomics, asked m...