The Last Time Tech Dominated The Top 5 In The S&P500 Was The 1999 Tech Bubble

The cumulative weight of the top 5 names in the S&P 500 index are the tech giants Apple, Microsoft, Google, Amazon and Facebook.

The last time there was a top 5 concentration this large was during the tech bubble of 1999.

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Will history repeat itself? 

Or just keep dancing?

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