Price momentum is one of the essential factors in a quantitative investor’s toolbox, consistently demonstrating its effectiveness across different asset classes and multiple market cycles.  The dimension of periodicity indicates that time frame is a key determinant of Mo’s potential. Shorter time frames exhibit a reversal pattern, however 9- and 12-month windows show nicely positive results.  Furthermore, Momentum's success at the stock level translates into excellent returns when companies are grouped into sectors and industries. Our research indicates that Mo is at its best when industries are more narrowly defined rather than being applied at the sector level.