The path-dependent characteristic of American option results in it's pricing complexity and causes the pricing differences from American call option and put option.

美式期权的路径依赖特征导致了其定价的复杂性，并使得美式看涨、看跌期权之间的定价原理差异较大。

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In the particular financial market, the pricing formula and hedging strategy of European option and bounds of the price on American call option are also considered.

在具体金融市场，给出欧式期权的定价公式和套期保值策略，以及美式看涨期权价格的界。

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When investors had right to delay development for intending oilfield, the investment decision making of the oilfield development project can be similar to American call options.

当投资者对拟开发油田具有延迟开发权利时，油田开发项目的投资决策可类比于美式看涨期权。

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The aim is to stop what American officials call a "harmful" increase in tire imports.

VOA: special.2009.09.18

Under that heading you might call "American Progress" came the sense of American mission: spreading liberty, spreading democracy, spreading Christianity.

在"美国式进步"的带领下,发展成为一种美国的使命,即推广自由民主,传播基督教思想

耶鲁公开课 - 美国内战与重建课程节选

Both had participated in what David Donald used to call the great American practice or custom, tradition actually he called it, of compromise.

他们都参与了,大卫·唐纳德曾经称为,那场伟大的美国实践或美国习俗,实际上他称之为传统,和解的传统

耶鲁公开课 - 美国内战与重建课程节选

ClientLogic says there are many reasons why American firms might prefer hiring American call-centre workers to foreign ones.

ECONOMIST: Call centres

But I question whether Washington politicians would overcome that reluctance for the promise of 5, 000 American call center workers.

FORBES: Should U.S. Approve T-Mobile USA/AT&T Deal For 5,000 Call Center Jobs?

There were sideswipes at the Liberal leader, Charles Kennedy, for cavilling at the American call for its allies to back military action.

ECONOMIST: Conservative Party conference: Who said we don't like Europe? | The