Realty rates follow population

US housing markets showcase fluctuations of birth rate and demand, offering clues to China's future prospects

Realty prices in the United States have fallen by more than 30 percent since the 2008 subprime crisis. That is partly a result of bursting bubbles, but one of the root causes lies in changes in US population size and structure, which brought declining needs and consuming power.

A primary index of supply-demand relation in the US housing market, vacancy rates have been constantly rising since March this year to reflect the declining consumption capacity of residents.