PT - JOURNAL ARTICLE AU - Marvin McClay TI - Is the Equity Market Becoming More Volatile? AID - 10.3905/jpm.1981.51 DP - 1981 Apr 30 TA - The Journal of Portfolio Management PG - 51--54 VI - 7 IP - 3 4099 - https://pm-research.com/content/7/3/51.short 4100 - https://pm-research.com/content/7/3/51.full