有捨才有得

 i am 中石油之「老股民」😒😒 2015/4/29 857 @9.92

 my cost: 2021 Jul ~ $2.59 😑😑 

sell 941*500= $26,250 switch to buy 728*2.9*9000shares 💀💀💀

sell 941*500 at $52.5