ETFs also gained popularity because investors can trade them all day long, whereas a mutual fund can be liquidated only at the beginning and end of the trading day.

交易所交易基金受到人们欢迎的另外一个原因是投资者可以在全天的交易时间中进行交易，然而共同基金只能在交易日之前或之后进行结算。

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Also, these bets were not placed in liquid markets that trade all day long at narrow spreads between bid and asked like sovereign bonds or multinational stocks.

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The difference is that you can trade it all day long in real time.

FORBES: Intelligent Investing Briefing Book

And if you're wise enough not to trade it all day long in real time, but to hold it, who could be against it?

FORBES: Intelligent Investing Briefing Book