The S&P 500 has more than quadrupled over the last decade, but its concentration in the technology sector, which represents about 37 % of its total value, and in communication services, reaching nearly 50 % combined, poses concentration risks for investors. Experts warn against parallels with the dot-com bubble of 2000-2002 and recommend diversification through international stocks, small-caps, short-term bonds and gold. Some investments have outperformed the S&P 500 this year, such as small-cap ETFs and emerging markets, with more attractive valuations (10-15x vs 20x for the S&P 500). Gold deserves a place in any diversified portfolio due to its low correlation with traditional asset classes. A simple test determines whether S&P 500 exposure is too high: if a 20 % drop in the index would change your plans, you are overexposed.
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