With Jeff Bezos at helm, Amazon's stock performance has made the S&P 500 look like a flat line - MarketWatch
![5 companies now make up 20% of the S&P 500. Here's why Goldman Sachs says that's a bad signal for future market returns. (MSFT, AAPL, AMZN, GOOGL, FB) | Markets Insider 5 companies now make up 20% of the S&P 500. Here's why Goldman Sachs says that's a bad signal for future market returns. (MSFT, AAPL, AMZN, GOOGL, FB) | Markets Insider](https://static2.businessinsider.com/image/5ea6d29138bf2305316562d3-462/market-concentration-goldman.png)
5 companies now make up 20% of the S&P 500. Here's why Goldman Sachs says that's a bad signal for future market returns. (MSFT, AAPL, AMZN, GOOGL, FB) | Markets Insider
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Amazon surges, leading gains in the S&P 500 after a 'record-breaking' holiday season (AMZN) | Markets Insider
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Apple, Microsoft, Amazon, Google And Facebook Make Up A Record Chunk Of The S&P 500. Here's Why That Might Be Dangerous
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S&P 500 trading near record highs for three sessions as all eyes on inflation data - The Financial Express
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