Strategy. Under normal circumstances, the fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in securities of real asset companies worldwide. The fund seeks to achieve its investment objective by allocating its assets among the following types of real asset companies: real estate companies (real estate investment trusts (REITs) and real estate operating companies); natural resources companies (companies that primarily own, explore, mine, process or otherwise develop commodities and natural resources); infrastructure companies (publicly-listed companies in sectors such as utilities, telecommunications and industrials); master limited partnerships (MLPs) that are engaged in the transportation, storage, processing, refining, marketing, production, or mining of natural resources in the energy sector (up to a maximum of 25% of the … Show more… Under normal circumstances, the fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in securities of real asset companies worldwide. The fund seeks to achieve its investment objective by allocating its assets among the following types of real asset companies: real estate companies (real estate investment trusts (REITs) and real estate operating companies); natural resources companies (companies that primarily own, explore, mine, process or otherwise develop commodities and natural resources); infrastructure companies (publicly-listed companies in sectors such as utilities, telecommunications and industrials); master limited partnerships (MLPs) that are engaged in the transportation, storage, processing, refining, marketing, production, or mining of natural resources in the energy sector (up to a maximum of 25% of the funds net assets); and agriculture and timber companies (collectively, Real Asset Companies). Real Asset Companies may include tangible assets and investments that have the potential to perform well in periods of inflation. The securities in which the fund may invest include: common stock, depositary receipts, preferred stock, securities convertible into common stock, rights, warrants, and exchange-traded funds (ETFs). The fund may also invest in cash, cash equivalents, and derivative instruments. Derivatives may be used to reduce risk, obtain efficient market exposure, and/or enhance investment returns, and may include swaps, forward contracts, options, currency derivatives (including currency forwards, futures, options, and spot transactions), and similar instruments or combinations thereof. The fund may also invest in debt securities, including convertible bonds, without any maturity limit and of any credit quality, including high-yield securities (i.e., junk bonds). In managing the fund, the funds manager determines the funds strategic asset allocation among general investment categories, which are executed by multiple subadvisors. The allocations may vary from time to time, and the fund may add additional investment categories. The fund concentrates its investments (invests more than 25% of its net assets) in the Real Asset Companies group of industries. Except for the foregoing concentration policy, the fund retains considerable latitude in allocating its assets. The fund may invest in equity securities regardless of market capitalization size (small, medium, or large) and style (growth or value). The fund may also invest in securities of companies worldwide. Country and regional weights are driven by bottom-up security selection and are typically unconstrained; however, the fund will generally be diversified regionally across global equity markets, including emerging markets. The fund may invest in securities of foreign issuers, including through American Depositary Receipts (ADRs), European Depositary Receipts (EDRs) and Global Depositary Receipts (GDRs). The fund may trade securities actively, which could result in a higher-than-average portfolio turnover rate and increase its transaction costs (thus lowering performance). Show less