To synthesise it, the ETF provider usually enters into a transaction known as a total return swap with a bank.

为了人工合成它，ETF提供者通常达成一项被认为是与银行交换的累计回报的交易。

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It may be too costly or impractical to replicate the targeted index completely. To synthesise it, the ETF provider usually enters into a transaction known as a total return swap with a bank.

完全复制目标指数也许太昂贵了或是不切实际的，为了达到混合的目的，ETF的供应商往往和银行进行一个被称为总收益互换的交易。

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And the Pimco Total Return ETF will put that juice to the test.

FORBES: Pimco Total Return ETF Shines a Light on Transaction Costs

And some of the newer bond ETFs (like PIMCO Total Return ETF, BOND) show signs of being real competitors for bond funds down the road.

FORBES: Five Reasons Bond Funds Are Better Than ETFs

With the initial run of the Pimco Total Return ETF ( BOND), active ETFs and their managers may need to start thinking about the challenges that success could pose to the ETF structure.

FORBES: BOND and the Future of Active ETFs