NicholasLardy of the Brookings Institution notes another reason for the outflows: a huge increase in trade credit extended to foreign (mainly South-East Asian) buyers of Chinese goods.
The Washington Post cites NicholasLardy, a respected China-watcher at the Peterson Institute, as saying that urban housing stock accounts for 41% of household wealth in China, compared to 26% in the U.S., though mortgage lending is much more restrictive in China.