Strategy. The Fund normally invests at least 80% of its total assets in Office and Commercial Real Estate Companies, as defined below. For purposes of this policy, the term assets means net assets plus the amount of any borrowings for investment purposes. The Office and Commercial REITs Index is comprised of equity securities of Office and Commercial Real Estate Companies and is intended to give investors a means of tracking the overall performance of U.S exchange-listed real estate investment trusts ("REITs") involved in the office and commercial real estate markets. "Office and Commercial Real Estate Companies" are U.S. exchange-listed REITs that are primarily engaged in the office, industrial and/or retail real estate segments. Pursuant to the Index methodology, REITs that derive … Show more… The Fund normally invests at least 80% of its total assets in Office and Commercial Real Estate Companies, as defined below. For purposes of this policy, the term assets means net assets plus the amount of any borrowings for investment purposes. The Office and Commercial REITs Index is comprised of equity securities of Office and Commercial Real Estate Companies and is intended to give investors a means of tracking the overall performance of U.S exchange-listed real estate investment trusts ("REITs") involved in the office and commercial real estate markets. "Office and Commercial Real Estate Companies" are U.S. exchange-listed REITs that are primarily engaged in the office, industrial and/or retail real estate segments. Pursuant to the Index methodology, REITs that derive at least 50% of their revenue from the office segment are considered office REITs and those that generate at least 50% of their revenue from the industrial and retail segment ?are considered commercial REITs. The Office and Commercial REITs Index is published by MarketVector Indexes GmbH (the "Index provider"), a wholly owned subsidiary of the Adviser. The Office and Commercial REITs Index is a rules based, modified capitalization weighted, float adjusted index. To be initially eligible for the Office and Commercial REITs Index, a REIT must (i) derive at least 50% of its revenues from the office (excluding medical and life sciences offices), industrial and/or retail real estate segments and (ii) have a market capitalization of at least $500 million as of the end of the month prior to the month in which a rebalancing date occurs. As of December 31, 2024, the Office and Commercial REITs Index included 24 securities of companies with a market capitalization range of between approximately $428 million and $97.9 billion and a weighted average market capitalization of $12.9 billion. These amounts are subject to change. The Fund's 80% investment policy is non-fundamental and may be changed without shareholder approval upon 60 days' prior written notice to shareholders. The Index provider reconstitutes the Index on a semi-annual basis and rebalances the Office and Commercial REITs Index quarterly. The Fund, using a passive or indexing investment approach, attempts to approximate the investment performance of the Office and Commercial REITs Index by investing in a portfolio of securities that generally replicates the Office and Commercial REITs Index. Unlike many investment companies that try to beat the performance of a benchmark index, the Fund does not try to beat the Office and Commercial REITs Index and does not seek temporary defensive positions that are inconsistent with its investment objective of seeking to track the Office and Commercial REITs Index. The Fund is classified as a non-diversified fund under the Investment Company Act of 1940, as amended (the Investment Company Act of 1940), and, therefore, may invest a greater percentage of its assets in a particular issuer. The Fund may concentrate its investments in a particular industry or group of industries to the extent that the Index concentrates in an industry or group of industries. As of December 31, 2024, the real estate sector represented a significant portion of the Fund. Show less