Shareholder Accounts in Money Funds Rebound to 38 Million in 2006. In yet another excerpt from the Investment Company Institute's 2007 Fact Book, shareholder accounts in money market mutual funds totalled 38.4 million in 2006, 32.68 million retail and 5.76 million institutional. Table 35 "Total Net Assets, Net New Cash Flow, and Number of Shareholder Accounts of Money Market Mutual Funds by Type of Funds" shows that this total remains well below the year 2000's record of 48.1 million accounts. Undoubtedly, much of the decline can be traced to the "bankerage" trend, brokerages sweeping excess account cash into banks instead of money funds.