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基金作为一种投资工具，其生命力在于通过有效的投资组合，专家理解和规模效益实现投资资金、投资能力和投资回报的最佳组合。美国的共同基金业从1924年波士顿第一基金问世以来，在有效市场理论（εM7）的原始模式和修正模式的理论指引下，70年间获得了长足的发展，至1994年仅
The fund as an investment tool has the vitality of achieving the best combination of investment funds, investment ability and return on investment through effective investment portfolio, expert understanding and economies of scale. Since the advent of the First Boston Fund in 1924, the United States mutual fund industry has made great strides in 70 years under the theoretical guidance of the original mode and the revised mode of effective market theory (εM7), and only by 1994