Northern Bond Index NOBOX

The fund will invest substantially all (and at least 80%) of its net assets in bonds and other fixed-income securities included in the index in weightings that approximate the relative composition of securities contained in the index. The index measures the investment grade, U.S. dollar-denominated, fixed-rate taxable bond market, including Treasuries, government-related and corporate securities, mortgage-backed securities, asset-backed securities, and commercial mortgage-backed securities.