Behaviorists tell us that we tend to overweight and overreact to the most recently received information. If we do, we will find that the information that we thought was so important becomes tempered, and reduced in significance, by new and related information that follows.
"The Inefficient Stock Market - What Pays Off And Why". Book by Robert Haugen, Chapter 12, The Forces behind the Technical Payoffs to Price History, p. 121, 1999.