I could get a really big upper bound, this thing grows exponentially.

那么我可以得出一个相当大的上界，我们可以给一个指数级增长的上限。

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The S&P 500 is 500 companies, who are major companies, so these tend to be mature companies and they tend to be in the dividend-paying stage.

标准普尔500指数包括500家大公司,这些一般都是成熟期的公司,他们一般都处于需要支付股利的阶段

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