来自《耶鲁大学开放课程：金融市场 第1集 第1集》

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  After that I want to talk about the stock market
  在后面我会讲到股票市场
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  and I want to--there's a lot to talk about.
  我会讲到很多知识
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  Of course, stocks are shares in companies
  当然 股票是公司的股份
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  and they're traded on stock exchanges
  它们在证券交易所交易
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  and they're interesting to analyze
  但许多人对股票一知半解
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  because there's sort of an ambiguity about stocks
  所以股票研究起来
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  that is not widely perceived by a lot of people.
  会非常有趣
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  That is, share repurchase can change
  即 股票的购回会改变
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  the units of measurement in a security
  已发行股票的单位数量
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  and companies have to decide
  公司需要决定
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  how leveraged the stock will be,
  股票的杠杆效用是多少
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  which changes the stock price--leverage,
  杠杆会改变股价