来自《耶鲁大学开放课程：金融理论 第9集 第9集》

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  So if the guy is offering you the investment opportunity at a
  如果有人对这个投资要价更高
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  higher price, it's crazy to do it.
  那真是愚蠢的行为
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  You could have bought those cash flows yourself by paying
  你还不如自己直接花钱买入这笔
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  this price.
  现金流量
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  If he offers it to you at a lower price than that,
  如果他的要价更低
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  then definitely you should do it, because it's a bargain,
  那这就是笔划算的交易
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  because if you had to buy it yourself,
  因为如果你直接买入
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  it would be more expensive.
  的价格更高
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  In fact, you can make an arbitrage profit.
  实际上你可以赚取套利收益
• 
  
  If he's offering it to you at a lower price, you can buy it and
  如果他的要价更低你就可以买入
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  how do you buy it?
  你该怎么买入
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  By selling these very promises, C, C, C on the market,
  可以通过在市场上出售这些现金承诺