In recent months, the US real estate market has seen its fair share of turbulent weather as house prices continue to fall. While the Federal Reserve has taken significant steps towards making lending cheaper, interest rates remain artificially high as the troubled financial sector continues record write-downs. So far, only a quarter of the IMF-estimated $1 trillion in sub-prime losses have been reported, which means mortgages won't be affordable for a long while, even if homes continue to decline in value. According to the Case Schiller house price index, which covers 20 major metropolitan areas, house prices are depressing at an annual rate of 12.7%, though its rate of descent is accelerating. As long as homeowners continue to lose equity, loans will become increasingly difficult to obtain.