PT - JOURNAL ARTICLE AU - James F. Gammill, Jr. AU - André F. Perold TI - The changing character of stock market liquidity AID - 10.3905/jpm.1989.409210 DP - 1989 Apr 30 TA - The Journal of Portfolio Management PG - 13--18 VI - 15 IP - 3 4099 - https://pm-research.com/content/15/3/13.short 4100 - https://pm-research.com/content/15/3/13.full