No hard facts exist, but anecdotedly, approximately 40% of the New York City real estate market is made up of foreign buyers. In particular, mega wealthy Russsian, Chineese and Brazilian investors are driving the city property landscape. But the recent deterioration of US Russia relations has many concerned how it may affect real estate business.
Link to article March 28, 2014 NYT
Manhattan’s Plaza Hotel where top floor condos are listed above $80M.