it reminds of that movie ROGUE TRADER if you havn't seen that have a look it was out a couple of years ago 1999 i think he lost 50 mil in a day in that one its a true story i think.He starts trading where he can't go wrong then things turn bad some familar
here is a trailer
http://mymovies.net/player/player.asp?url=/film/fid200/trailers/trid201/wm/bb.asx&filmid=200&sec=trailers
