The US is not worried whether China will sell the US Treasury bonds it holds, for the Fed can buy them back.

美国也并不担心中国是否会将手中的美国国债抛出，因为美联储能再买回来。

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The dollar fell to an all-time low against Swiss franc while gold touched a record high. Long-dated US Treasury bonds weakened while global stocks remained under pressure.

美元兑瑞士法郎汇率创历史新低，金价则攀上历史新高，美国长期国债走弱，全球股市继续受压。

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As if to underline the point, yields on US Treasury bonds actually fell in the days after the downgrade, as investors fled to them as a haven.

似乎正是为了突出这一点，美国国债收益率在降级之后的几天内的确有所下降，由于投资者都逃向了美国这个避风港。

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As the value of the dollar falls, their reserves of the currency also reduce in value, as do the yields on the US Treasury bonds held by many of their central banks.

BBC: Analysis

The US Treasury pays the Federal Reserve interest on the US Treasury bonds that the central bank has bought on the open market as part of its quantitative easing, but the Fed always sends that money right back again.

BBC: Why the Bank held off spending

Mr Jarnefelt's specialist area - German government bonds - is among the most stable in the market because, along with those issued by the US (called Treasury bonds), they are seen as among the lowest risk in the world.

BBC: Bond market shaken, not stirred - the life of a trader