The housing market has not yet hit bottom: No matter how you look at them, the new numbers on existing home sales released by the National Association of Realtors on Tuesday are terrible. Compared to a year ago, sales fell 25.5 percent, down to an annual rate of 3.83 million per year -- the lowest such rate in 15 years. The amount of time it would normally take to sell off the inventory of currently unsold homes jumped from 8.9 months to a disastrous 12.5.