In Shanghai:

Shanghai’s housing bust comes after a doubling of prices in the previous three years, a run-up fueled by massive speculation. With China’s economy booming and Shanghai at the center of worldwide attention, investors from Hong Kong, Taiwan and elsewhere were buying as fast as buildings were going up. At least 30% to 40% of homes sold were bought by speculators, says Zhang Zhijie, a real estate analyst at Soufun.com Academy, a research group in Shanghai.

This is bad news, because it could be the first stage of a collapse of the Chinese economy, with potentially very dire results for all of us.