What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.
Text: Nearly 50% of the S&P 500's Core Earnings comes from just 41 companies. The companies represent only 8% of the number of firms in the index, but over 40% of the index's market capitalization.
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moderately negative
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