RT Journal Article SR Electronic T1 The S&P 500 Universe: Trend and Volatility Regimes JF The Journal of Index Investing FD Institutional Investor Journals SP 85 OP 91 DO 10.3905/jii.2010.1.3.085 VO 1 IS 3 A1 Joel Clarke Gibbons YR 2010 UL https://pm-research.com/content/1/3/85.abstract 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 & 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