Preventing the free flow of goods and services and capital across international boundaries. That is a danger because in order for markets to work, you need arbitrage to work.

阻止商品、服务以及资本的跨界自由流动是十分危险的，因为想要使市场发挥作用，你就必须令套利发挥作用。

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If you discover an arbitrage opportunity-otherwise known as a "price anomaly" or "free money" -it will be profitable only as long as few people know about it.

如果你发现了一个套利机会，那么只有其他人还不太知道它时，它才会让你盈利。

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We characterize arbitrage-free interval.

我们刻画了无套利区间。

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But my best guess is that someone on that risk free arbitrage desk moved from risk free pure arbitrage into very definitely not risk free time arbitrage, or speculation as we should call it, then the market moved against his bet.

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This risk-free arbitrage trade locked in a small profit for the institutional investor and kept the SuperUnit market price in line with its underlying value.

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However, one of this summer's best investment tips, currency arbitrage, is risk-free.

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