对于资金的大幅增长，最常见的解释是：据称，中国央行去年为了将资金留在海外而与各商业银行安排了一系列货币掉期交易，而这些交易目前正逐渐到期。
The most common explanation offered for the surge in funds is the unwinding of currency swaps that the PBoC is said to have arranged last year with Chinese commercial banks to keep funds offshore .
货币掉期交易