CNN CNN Newsroom Live July 7, 2015 06:49:00
>> just 3,000 u.s. dollars. >> reporter: to start with. >> that's a lot of money when you are 15 years old. >> reporter: li claimed he doubled his parent's money in one day by buying crude oil and silver futures. do you think you got lucky that day? >> yeah yeah. >> reporter: he has been buying and selling stocks ever since but it's lately his luck may be running out. over the last three weeks, china's once booming stock markets have tumbled more than 20%. at one point this high school senior says he lost 140 rmb, around $22,000. this teenager is not the only stressed out person riding the sto...