A form of pricing efficiency where the price of the security fully reflects all public information (including, but not limited to, historical price and trading patterns). Compare weak form efficiency and strong form efficiency .
SEMI-STRONG FORM EFFICIENCY
Meaning of SEMI-STRONG FORM EFFICIENCY in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012