The SEC brought its first case involving exchange-traded funds only last month, and its first case involving credit-default swaps in 2009 (it lost).

SEC起诉的第一起涉及交易所交易基金的案件仅仅是在上个月，第一起涉及信用违约交换的案件是在2009年(申诉失败)。

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With mutual funds and exchange-traded funds, it gets trickier to book your loss in one fund and redeploy into another.

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Fast-forward two decades and there are dozens of exchange-traded funds and mutual funds that track and speculate on specific currencies, making it easier and somewhat safer to invest in everything from the Russian ruble to the Indian rupee and Swedish krona.

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The central bank also said that it would buy relatively riskier assets such as exchange-traded funds and real-estate investment trusts.

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