S&P 500 market decline in 2026

What happened: The S&P 500, after a strong 2025 with a 28% return, has struggled in 2026, declining 4.6% year-to-date as of March 26. This downturn is notable as the first quarter is typically positive for equities, with an average gain of 2.0% since 1980. The decline is broad-based, with the tech sector pulling back, and even the most diversified U.S. stock market index, the S&P 500, falling in Q1. Robinhood, one of the worst-performing stocks this year, is down around 7%. Meanwhile, the S&P 500's top 10 companies now account for 38% of its total market capitalization, up from 27% in 2020, raising concerns about concentration.

Market impact: The market decline has been driven by geopolitical tensions, including the war in Ukraine and Middle East hostilities, rising U.S. debt, consumer debt concerns, and political division. This has led to a rotation away from growth stocks and increased volatility. The S&P 500 remains valued at a premium, with a forward P/E ratio of around 18.5, compared to its historical average of 15.5. This repricing could continue if earnings growth fails to meet expectations.

What to watch next: The upcoming earnings season, starting mid-April, will provide crucial insights into corporate health and earnings growth. Specifically, investors will be watching earnings reports from major tech companies like Alphabet, Amazon, and Microsoft, which have significant weight in the S&P 500. Additionally, the April 26 FOMC meeting will be closely watched for any changes in monetary policy, which could impact stock valuations.