Semiconductor stocks are leading the S&P 500's surge to new record highs, raising questions about the sustainability of the current rally. These stocks now account for 18% of the index, a proportion not seen in over two decades. This significant weighting means that any shift in market momentum or a cooling in chip demand could potentially trigger a broader market sell-off. While many investors believe the widespread adoption of artificial intelligence services could break the traditional boom-and-bust cycle, others caution that semiconductor companies remain highly susceptible to business cycle fluctuations and severe market downturns.
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