Fidelity Cash Reserves, a $130.7 billion money market fund, is now the biggest mutual fund in the nation, surpassing American Funds’ Growth Fund of America. And Fidelity Investments is no longer the biggest fund company in the nation; Vanguard is.

Today, only one stock mutual fund is among the five biggest in the nation, and the Vanguard 500 Index Fund, which was the biggest fund in the nation five years ago, with $88.9 billion in assets under management, ranks No. 7 today, with $80.7 billion under management.

Only a handful of fund companies have attracted net inflows this year, ProFunds, among them, principally because it offers funds that short the market; its assets are up 123% to $23 billion. PIMCO, which offers bond funds, has seen its assets grow 3% to $220.3 billion.

Meanwhile, the number of funds being liquidated is up considerably from last year, with 560 funds folding, up from 498 in 2007.