Strategy. Under normal circumstances, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in fixed income securities (80% policy). This policy may be changed only upon 60 days prior notice to shareholders. The Fund focuses on securities issued or guaranteed by the US government or its agencies or instrumentalities, corporate debt securities, taxable and tax-exempt municipal securities, and mortgage-backed and asset-backed securities. The Fund invests primarily in investment grade fixed income securities (that is, those rated BBB- or higher by Standard & Poors Financial Services LLC (S&P), Baa3 or higher by Moodys Investors Service, Inc. (Moodys), or similarly rated by another nationally recognized statistical rating organization (NRSRO), or, if unrated, … Show more… Under normal circumstances, the Fund will invest at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in fixed income securities (80% policy). This policy may be changed only upon 60 days prior notice to shareholders. The Fund focuses on securities issued or guaranteed by the US government or its agencies or instrumentalities, corporate debt securities, taxable and tax-exempt municipal securities, and mortgage-backed and asset-backed securities. The Fund invests primarily in investment grade fixed income securities (that is, those rated BBB- or higher by Standard & Poors Financial Services LLC (S&P), Baa3 or higher by Moodys Investors Service, Inc. (Moodys), or similarly rated by another nationally recognized statistical rating organization (NRSRO), or, if unrated, those determined by the Manager or a sub-advisor to be of comparable quality). The Fund may also invest in high yield securities (commonly known as junk bonds) rated lower than BBB- by S&P, lower than Baa3 by Moodys, or similarly rated by another NRSRO, or, if unrated, determined by the Manager or the sub-advisor to be of comparable quality. The Fund may invest in securities denominated in foreign currencies and US dollar-denominated securities of foreign issuers. The Fund may also invest in bank loans and other floating-rate securities, preferred stocks, and structured product securities. In keeping with the Funds investment objective, the Fund may also invest in derivatives, including futures and options, and credit default swaps. The Fund may purchase individual securities of any maturity. The Manager has selected Pacific Investment Management Company LLC (PIMCO) to serve as the Funds sub-advisor. The sub-advisor is responsible for the day-to-day investment management of the portion of the Funds assets that the Manager allocates to the sub-advisor. The Manager also is responsible for the day-to-day investment management of a portion of the Funds assets. The Manager may change the allocation between the Manager and sub-advisor at any time. The relative values of the Managers and sub-advisors share of the Funds assets also may change over time. The Manager and the sub-advisor each select investments for their respective portion of the Fund based on their own investment style and strategy as described below. In managing its portion of the Funds assets, the Manager allocates investments principally among the following four sectors of the fixed income securities market: (1) the US investment grade sector; (2) the US high yield sector; (3) the international developed markets sector; and (4) the emerging markets sector. The Manager determines how much to allocate to each of these sectors based on its evaluation of economic and market conditions and its assessment of the returns and potential for appreciation that can be achieved from investments in each of the sectors. Allocations of the Fund's assets among these four sectors will vary over time and the Fund may not be invested in all of these sectors at all times. In addition, the Manager may seek investment advice and recommendations from its affiliates: Macquarie Investment Management Austria Kapitalanlage AG (MIMAK), Macquarie Investment Management Europe Limited (MIMEL), and Macquarie Investment Management Global Limited (MIMGL) (together, the Affiliated Sub-Advisors). The Manager may also permit these Affiliated Sub-Advisors to execute Fund security trades on behalf of the Manager and exercise investment discretion for securities in certain markets where the Manager believes it will be beneficial to utilize an Affiliated Sub-Advisors specialized market knowledge. In selecting securities when managing its portion of the Fund's assets, PIMCO's investment process includes both top-down and bottom up decision-making. From the top-down, PIMCO develops its outlook for global bond markets over the secular (five years) and cyclical (6-12 months) horizon with a focus on monetary and fiscal policy, inflation and growth expectations. Bottom-up security selection is an important aspect of portfolio construction. Sector specialists are charged with determining relative value within their sectors and play a key role in security selection. An important resource for the sector specialists is PIMCO's staff of highly seasoned analysts who conduct independent security analysis. PIMCO also utilizes an extensive library of proprietary analytical software to help quantify risks and relative value in different securities. The proportion of the Fund's assets committed to investment in securities with particular characteristics (such as quality, sector, interest rate or maturity) varies based on PIMCO's outlook for the US economy and the economies of other countries in the world, the financial markets and other factors. PIMCO attempts to identify areas of the bond market that are undervalued relative to the rest of the market. PIMCO identifies these areas by grouping bonds into sectors such as money markets, governments, corporates, mortgages, asset-backed and international. Sophisticated proprietary software then assists in evaluating sectors and pricing specific securities. Once investment opportunities are identified, PIMCO will shift assets among sectors depending upon changes in relative valuations and credit spreads. There is no guarantee that PIMCO's security selection techniques will produce the desired results. In response to market, economic, political, or other conditions, the Manager or the sub-advisor may temporarily use a different investment strategy for defensive purposes. If the Manager or the sub-advisor does so, different factors could affect the Funds performance and the Fund may not achieve its 27 Fund summaries investment objective. The Funds investment objective is nonfundamental and may be changed without shareholder approval. However, the Funds Board of Trustees (Board) must approve any changes to nonfundamental investment objectives, and the Funds shareholders would be given at least 60 days notice prior to any such change. Show less