PT - JOURNAL ARTICLE AU - Robert A Ferguson TI - An Efficient Stock Market? Ridiculous! AID - 10.3905/jpm.1983.31 DP - 1983 Jul 31 TA - The Journal of Portfolio Management PG - 31--38 VI - 9 IP - 4 4099 - https://pm-research.com/content/9/4/31.short 4100 - https://pm-research.com/content/9/4/31.full