PT - JOURNAL ARTICLE AU - Joel Clarke Gibbons TI - The S&amp;P 500 Universe: <em>Trend and Volatility Regimes</em> AID - 10.3905/jii.2010.1.3.085 DP - 2010 Nov 30 TA - The Journal of Index Investing PG - 85--91 VI - 1 IP - 3 4099 - https://pm-research.com/content/1/3/85.short 4100 - https://pm-research.com/content/1/3/85.full AB - All markets pass from one regime to another in the course of time. Statistical models are available to study and quantify the regimes and the transitions. In this article the author looks at monthly data of the history of the Standard &amp; Poor’s 500 Index through the filter of a Regime-Switching Model to find evidence of expected return regimes and volatility regimes, and at the transition probabilities from one to another.TOPICS: Mutual fund performance, financial crises and financial market history, volatility measures