Mark Zuckerberg en A Perk Of Being Rich: Facebook's Zuckerberg Pays 1 Percent Interest On Mortgage Last Thursday, the interest rate on 30-year mortgages <a href="">dipped to its lowest level ever</a>: 3.56 percent.<p>But if you were a billionaire with flexibility you could probably be paying a lot less. Mon, 16 Jul 2012 16:39:00 +0000 editor 15851 at