(Bloomberg) -- Being a hedge fund manager used to be the kind of job you did after a stressful life in banking. Now, not only are there fewer such roles, but they're as taxing as ever. Indeed, the entire money-management world is being turned on its head as investors realize that passive strategies are cheaper, and often perform better.

Amount Vanguard long-term mutual funds and ETFs attracted in March: $29 billion.

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