is on a tear, rising nearly 10% so far this year — in stark contrast to a 13% decline over the same period last year.
But gains in the benchmark index — which tracks a broad range of sectors such as banks, manufacturing, tech, and retail — are thanks to massive upswings from just five companies: Apple, Microsoft, Alphabet, Amazon, and Nvidia, all of which have posted outsized gains in market cap this year so far. The companies are part of the elusive club of firms touching $1 trillion in market valuation, with Nvidia becoming the latest company to brieflyCollectively, the five companies have raised their market cap by about $2.9 trillion in 2023 — contributing 96% of the almost $3 trillion gains in the S&P 500's market value this year,This means the rest of the 495 companies in the S&P 500 contributed to just 4%, or $110 billion in the index's gain, per Fortune.
The outsized gains of the five companies have also put the benchmark index under scrutiny for concentration risk, as"Today's US price action is another reminder that this year's favorable equity market performance is still about a handful of tech stocks. Not only is the Nasdaq outperforming again but, also, the S&P 500 would be in negative territory were it not for
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