The S&P 500 is a major U.S. stock market index that tracks the performance of 500 of the largest publicly traded companies in the United States. Maintained by S&P Dow Jones Indices, it is widely regarded as one of the best single gauges of the health of the large-cap U.S. equity market, covering approximately 80% of the available market capitalization.
This index is notable because it serves as a primary benchmark for the overall U.S. stock market and the economy. Its performance is closely monitored by investors, financial analysts, and policymakers worldwide. Many investment funds, including index funds and exchange-traded funds (ETFs), are designed to mirror its composition, making it a cornerstone of modern portfolio management.
Recently, the S&P 500 has been a focal point in financial news due to a period of significant market volatility. In mid-November 2025, headlines reported a multi-day losing streak for the index, with substantial point drops. Financial outlets highlighted concerns over technical sell signals, the index falling below key support levels, and broader market declines also affecting the Dow and Nasdaq, contributing to a cautious investor sentiment.
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