Momentum Player

Momentum Player

An investor who buys securities that have performed well over the previous three to 12 months and sells those that have been performing poorly over the same period. This is a form of short-term investing based on the underlying belief that trends generally continue for a long period of time. This belief is at odds with the efficient markets theory, because momentum investing assumes that even inefficiently priced securities tend to remain inefficiently priced. Economists therefore disagree on whether momentum players pursue a sound strategy.