如果套利者预期不同交割月的期货合约的价差将缩小（Narrow）时，套利者可通过卖出其中价格较高的一“边”同时买入价格较低的一“边”来进行套利，我们称这种套利为卖出套利（Bell Spread）。
在债券互换交易中，你可在一个市场上购买一种债券，同时又在另一个市场上卖出，这叫套利。
In a bond swap, you buy one bond on one market and sell it at the same time on another. This is called arbitrage.
从理论上讲，套利是指在不同的市场上同时买进和卖出两个相同的商品，以赚取差价。
In theory, arbitrage is the simultaneous purchase and sale of two identical commodities to take advantage of price variations in different markets.
上周欧元对澳元跃升约8%。这是投资者结清套利交易，即买进欧元、卖出他们下注的那些货币而导致的。
The euro jumped some 8% against the Australian dollar last week as invest ors closed out these trades, which meant buying the euro and selling the currencies on which they bet.
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