The investment seeks to track the investment results of the Bloomberg Barclays U.S. Corporate Aaa - A Capped Index. The fund generally will invest at least 90% of its assets in the component securities of the underlying index and may invest up to 10% of its assets in certain futures, options and swap contracts, cash and cash equivalents. The underlying index is a subset of the Bloomberg Barclays U.S. Corporate Index, which measures the performance of the Aaa - A rated range of the fixed-rate, U.S. dollar-denominated taxable, corporate bond market.