Why do at-the-money calls increase more in percentage terms, than the shares of firms added to theindex?

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ThaDRAGN answered a question in Options.
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ThaDRAGN answered one year ago …

Well that isn't true in an absolute sense. That'll usually happen if the options are further away from the option expiration due to the fact that there's high Time Value premium placed on the option price (it'll tend to be more volatile).

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