Credit goes to Old Willy Pete and gamingreality as I am combining two methods here which personally netted me $1.3billion per character
. [Far beyond what you need but who knows what expensive stuff might be added in DLC.]
Pete's is on the Trading pure alpha page
and the GR one is http://www.gamingreality.com/2013/09/how-to-make-money-in-gt...
Here's a small guide on how to make money with Lester's assassination missions for Franklin [marked as a green L]
after you finish main storyline.- NOTE 1: You have to do the first assassination mission in order to progress in the story, after that ignore the L missions until endgame.- Note 2: Do not do them during the main story, wait till you do the final heist as you will end up with over $20million per character to begin this with.
STEP 1 - BEFORE the second assassination mission invest in [DEB] Debonaire (LCN). Sell at 80% return.
STEP 2 - Invest in [RWC] Redwood (LCN). Advance in game clock 2 days. Sell at 300% return.
STEP 3 - BEFORE the third assassination mission invest in [FRT] Fruit (BAWSAQ). Sell at 50% return.
STEP 4 - Invest in [FAC] Facade (Bawsaq). Advance in game clock 2 days. Sell at a large return [I don't remember the amount.]
STEP 5 - AFTER the fourth assassination mission invest in [VAP] Vapid (BAWSAQ). Advance in game clock 2 days. Sell at 100% return. [When I sold this I had over $700million on each.]
STEP 6 - BEFORE the fifth assassination mission invest in [GCD] GoldCoast (LCN). Sell at 80% return.