Conjectures about foreign money buying depressed U.S. real estate looked plausible until about a month ago. The dollar has since rallied, and oil has tumbled–a major factor that was eroding the dollar. There are now some real signs out there that oil & other commodities are headed down. Gold, a major dollar bugaboo, has dropped a full 10%.
A lot of dollar-weakening grenades could still go off, but right now the dollar is strengthening.