Pimco is a unit of Munich- based insurer Allianz SE. Other Assets "Other" assets in the Total Return Fund dropped to 4 percent from 5 percent, according the website. This category may include municipal debt, convertible bonds, preferred shares and foreign bonds denominated in U.S. dollars, according to the Pimco website. Gross kept emerging-market bonds unchanged at 6 percent and held non-U.S. developed debt at 4 percent, the data show. The fund's government and Treasury debt category includes holdings of U.S. Treasury notes, bonds, agency debt, interest- rate swaps and inflation-protected securities. The Total Return Fund lost its rank as the world's biggest mutual fund in October to the Vanguard Total Stock Market Index Fund.