研究数据是按交易统计的，不是按基金种类。
这也许会使得该基金持有同种类的波动资产，例如股票、商品或垃圾债券。
This may cause it to hold the same kind of volatile assets, such as equities, commodities and junk debt.
Melanie不用投入大量的金钱就获得了实际的多元化(因为基金拥有许多不同种类的股票)。
Melanie gets instant diversification (because the fund owns many different kinds of stocks) without having to invest huge sums of money.
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