Yesterday, the IRS released Notice 2015-61, which provides guidance on the corporate bond monthly yield curve, the corresponding spot segment rates used under section 417(e)(3), and the 24-month average segment rates under section 430(h)(2).  The notice also provides guidance as to the interest rate on 30-year Treasury securities under section 417(e)(3)(A)(ii)(II), as in effect for plan years beginning before 2008, and the 30-year Treasury weighted average rate under section 431(c)(6)(E)(ii)(I).