美国的货币市场基金张忠亮在美国，有两类异常活跃的投资基金。一类是投资于资本市场的投资基金，即通常所说的共同基金，它主要以中长期证券资本，如股票、企业债券和中长期国债等为主要投资对象，因此有时也被称作股票共同基金或债券共同基金，另一类是投资于货币市场（... US money market fund Zhang Zhongliang in the United States, there are two types of extremely active investment funds. One is investment funds invested in capital markets, commonly referred to as mutual funds. They are mainly invested in long-term and medium-term securities capital stocks such as stocks, corporate bonds and medium-and-long-term treasury bonds, and are sometimes also called stocks common Fund or bond mutual funds, the other is to invest in money markets (...