Over the weekend, we asked the question, Did the Canary of New York's Luxury Housing Market Just Die, following reports of the bankruptcy of a New York luxury real estate developet. Now, just two days later, we learn that another high-end real estate developer is having trouble closing out an ultra-luxury project in Manhattan.

Courtesy of Bloomberg, we find that luxury real estate developer Extell Development Co can't sell luxury condos at what may be New York's premier ultra luxury destination, the One57 tower, which it is attributing it to the fact that there is an abundant supply of condos already on the market. As a reminder, One57 is where Bill Ackman paid $91.5 million in April 2015 for a condo (which he hoped to flip), just a few months before Valeant, and his fund, suffered staggering losses. Perhaps that should have been the tell.