Does reloading saves affect the stock market when doing the assassinat

[PenisCatcher]

A lot of guides for manipulating the stock market during Lester's assassination missions advise you to save before investing in anything or starting one of the missions, just in case something goes wrong or you mess up somehow. However I've also seen some people say that reloading a save after doing one of the assassination missions in order to get a higher return percentage than they got the first time will actually have the opposite effect due to the game giving you a smaller return percentage upon reloading an old save after you've already invested or completed a mission.

 

Can someone clear this up for me? Do you have to get the highest return percentage on your first attempt with these missions? Or can you reload old saves until you get the supposed highest return you can get?

 

Also if someone could point me to the best guide for manipulating the stock for the PS3 version of the game it would help me a lot!