The S&P 500’s (^GSPC) decline in June looks like a market sell-off. Under the hood, it is mostly a megacap problem.
The “Magnificent Seven” — Microsoft (MSFT), Amazon (AMZN), Apple (AAPL), Alphabet (GOOG, GOOGL), Nvidia (NVDA), Tesla (TSLA), and Meta (META) — have erased roughly $2 trillion in market value this month, according to Yahoo Finance analysis.
That accounts for more than two-thirds of the S&P 500’s total market-cap loss in June.
The group’s biggest drag has come from Microsoft and Amazon, which have each lost more than $350 billion in market value this month. Apple and Alphabet have each shed roughly $300 billion, while Nvidia and Tesla have lost about $260 billion and $200 billion, respectively.
The result is a top-heavy index doing what top-heavy indexes do: moving with its largest stocks.
It’s not that the rest of the market is very strong so much as the weakness is concentrated.
The Magnificent Seven are down a median 9.7% in June, while the rest of the S&P 500 has a median gain of 0.3%. That split helps explain why the index feels heavy even though many stocks are still holding up.
The same pressure showed up in Tuesday’s sell-off, when AI and chip-linked winners absorbed the biggest damage while the broader tape looked less broken underneath.
The concentration is even clearer when the market is split by dollar damage.
The 15 biggest S&P 500 market-cap losers are down 9.2% in June, while the rest of the index is down 0.2%.
That makes June less of a classic broad-market unwind and more of a leadership problem.
The market can survive narrow weakness if the average stock keeps holding up. But if chip leadership keeps cracking, the index’s biggest winners may remain the market’s biggest problem.
Jared Blikre is the global markets and data editor for Yahoo Finance. Follow him on X at @SPYJared or email him at jaredblikre@yahooinc.com.
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