So investiert der Credit Suisse Institutional Master Fund - CSIMF Global Bonds ex Securitized ZBH DUR Fonds: The fund invests in government and corporate bonds, with good credit quality and marketability. Asset and mortgage backed securities are explicitly excluded. Investments are made globally, without restrictions on currency, country or industry sector. Bond investments may only be acquired if they are rated "BBB-" or higher by one of the leading rating agencies or have been accorded a comparable internal rating