Uptown deals in danger?

Recent years have seen a major run-up of prices for rent stablized buildings in Upper Manhattan and the Bronx, as major real estate companies began purchasing with plans to aggressively increase rent rolls. According to a New York Times story, the recent disclosure that the owners of the Riverton Houses in Harlem might default on their loan has "shocked the real estate industry and has raised fears about other apartment building deals from the not-so-distant past."