The Blackstone Group, run by the occupant of 740 Park’s primo residence, has announced a half-a-billion-dollar third quarter loss, and marked down the value of most of its holdings, sharing the pain of most of the rest of us, who might have once felt we weren’t as smart as 740′s Stephen Schwarzman. The New York Post adds a compelling detail. When Blackstone went public, “Schwarzman’s stake was worth more than $7.8 billion, but currently has shrunk to $1.88 billion based on yesterday’s close of $7.55.” I bet he still has more than me, though. (So does the New York Times, which suggests [second item] that Schwarzman takes his winnings from the Blackstone IPO and take the company prviate again.)