Momentum，投资学中意思为续航，指股票(或经济指数)持续增长的能力。

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.

研究发现，赢家组合在牛市中存在着正的动量效应，输家组合在熊市中存在着负的动量效应。