The process of conveying information through a firm's actions. The more costly it is to provide a signal, the more credibility it has. For example, to call a press conference and tell everyone that the firm's prospects have improved is less effective than saying the same thing and raising the dividend .
SIGNAL
Meaning of SIGNAL in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012