According to the American Investment Company Institute (ICI), ETFs means some kind of fund units that are issued by the investment companies and are priced by the securities exchange markets.

• 根据美国投资公司协会（ICI）的定义，交易所交易基金是指投资公司发行的、在证券交易所由市场定价交易的基金单位，投资者像买卖任何上市公司股票那样通过经纪人或代理账户买卖ETFs单位。