The S&P 500 is the ‘perfectly constructed index’ – Goldman Sachs (NYSEARCA:SPY)

ETF Investment (Exchange Traded Funds)

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The S&P 500 (NYSEARCA:SPY) is “the perfectly constructed index,” where you need either the best top five names going higher or the other 495 names higher.

“They just can’t both be down a lot at the same time,” Goldman Sachs Analyst