Nationstar Mortgage has filed a $1 billion shelf registration with the Securities and Exchange Commission, signaling its intention to sell debt securities and other instruments to the general public. But whether the lender/servicer actually uses the shelf is another matter entirely. “The mixed shelf is the company’s first amendment or filing of a new registration statement since May 2013,” noted analyst Kevin Barker of Compass Point Research & Trading. A mixed shelf means Nationstar could issue debt, preferred and common stock, as well as depository shares and warrants. Interestingly, the filing came...