The Fund invests at least 80 percent of its total assets in the securities of the ICE BofA Diversified Core U.S. Preferred Securities Index (Underlying Index). The Fund also invests at least 80 percent of its total assets in preferred securities that are domiciled in, principally traded in or whose revenues are primarily from the U.S. The Fund's 80 percent investment policies are non-fundamental and require 60 days prior written notice to shareholders before they can be changed. The Fund may lend securities representing up to one-third of the value of the Funds total assets (including the value of the collateral received).