The interest rate on 10-year US Treasury bonds almost doub-led in six months, rising from 2.26 per cent last December to 3.98 per cent in mid-June, before de-creasing slightly in recent days. This sharp rise happened despite the Federal Reserve's quantitative easing policy aimed at lowering long-term rates by buying $300bn (€21bn, ￡18bn) of Treasuries and promising to buy more than $1,000bn of mortgage securities.
10年期美國國債利率在6個月內幾乎翻了一番，從去年12月的2.26%升至今年6月中旬的3.98%，最近幾日才略有下跌，盡管美聯儲(Fed)實行定量寬松政策，通過購買3000億美元國債，并承諾購買逾1萬億美元抵押貸款證券，力求推低長期利率。
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