Is the San Francisco housing market headed for a bubble?

The metro may already be in a housing bubble

Home prices have been on the rise since down-falling, but the coming years are expected to see cooling off trends. According to the fourth quarter Zillow Home Price Expectations survey, which asked more than 100 economists and real estate experts about national and local trends, there are varying ideas of where the market is headed and whether or not a bubble is around the corner.