Momentum，投資學中意思為續航，指股票(或經濟指數)持續增長的能力。
The research found that, the winner portfolio in the bull market has a positive momentum effect, while the loser portfolio in the bear market has a negative momentum effect.
研究發現，贏家組合在牛市中存在著正的動量效應，輸家組合在熊市中存在著負的動量效應。
