S&P 500 Research: All Studies
S&P 500 returns, drawdowns, and research on companies covered by TNI that are classified in the S&P 500.

S&P 500 Monthly Returns: Historical Returns by Month
Explore S&P 500 monthly returns from 1928 to the present, including average returns by month, positive and negative frequency, seasonal patterns, historical monthly performance, and current month-to-date performance.

Average Stock Market Return: Dividends, Inflation & 150+ Years of History
Explore more than 150 years of U.S. stock market returns, comparing total return with dividends reinvested, inflation-adjusted real return, and price return.

S&P 500 Returns by Year (1928–2026)
Nearly a century of S&P 500 market history, including annual returns, average return, positive and negative years, and 2026 YTD performance.

Stock Market Corrections: 100 Years of S&P 500 Drawdown History
Explore nearly 100 years of S&P 500 stock market corrections, bear markets, drawdowns and recoveries using daily historical closing-price data.