大ㄉㄚˋdà起ㄑㄧˇqǐ大ㄉㄚˋdà落ㄌㄨㄛˋluò

  1. 起伏差度極大，非常不穩定。如：「股市行情往往大起大落，讓人難以捉摸。」

英(of market prices etc)​ to rapidly fluctuate (idiom)​, volatile, significant ups and downs, roller coaster