"Vanguard vs. Pimco" made headlines last week, with Morningstar data revealing Vanguard's new status as the largest mutual fund - a spot which Pimco had since 2008.

Gross's Pimco Total Return Fund (PTTAX) has shrunk by $37.5 billion since the start of this year, ending last month with $247.9 billion in assets, according to data obtained by Bloomberg and provided by Newport Beach, Calif.-based Pacific Investment Management Co. In comparison, the Vanguard Total Stock Market Index Fund (VTSMX) ended October with $251 billion.

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