来自《耶鲁大学开放课程：金融市场 第11集 第11集》

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  so the ratio is unchanged.
  所以比例并没有变
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  You might ask, well why do they do splits?
  你可能会问 他们为什么要这么做呢
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  Well, it's just to keep the numbers--
  其实只是为了维持一定的数量
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  there's actually not a very good reason to do splits.
  实际上分割并没有很好的理由
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  There's no reason not to do splits either
  不分割也无可厚非
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  because it's just changing the units of measurement.
  它只是改变了量度的大小
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  But typically, in the United States,
  一般来说 在美国
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  they do splits to keep the price of
  分割旨在将每股价格
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  a share somewhere in the $20 to $40 range;
  维持在20到40美元间
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  there's interesting literature on why they do that.
  为什么这样做呢 有一个很有趣的理论
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  Maybe it's a tradition,
  也许是传统使然
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  maybe it's to keep the value kind of in a familiar range or a small--
  也许是为了将价值维持在一个惯常的小区间内