Stock Market is the easiest way to make money in GTA 5, as you only need to have enough investment money to trigger it. Below are all the tips and tricks you need to get the most out of the stock market. You can also make money from heists in GTA V as well.

1 - Lester Assassination Missions

These missions are probably the most fool-proof method to make money in the game. Before doing an assassination mission from Lester, you need to buy and sell specific stocks.

GTA 5 mission
GTA 5's assassination mission

Similar to the real-life stock market, each trading day begins at 8 AM. If you advance time, make sure that you check out at 8 AM each day. To advance time quickly, just go to the save screen when at a bed then exit.

Assassination Mission Stock to Purchase Before Mission Notes
Hotel Assassination BetaPharmaceuticals (BAWSAQ) Sell Beta after the mission, wait 3 days then buy Bilkinton (LCN). Wait a week then sell it.
The Multi-Target Assassination Debonaire Cigarettes (LCN) Sell Debonaire after the mission then purchase Redwood (LCN). Wait 2 days then sell it.
The Vice Assassination Fruit (BAWSAQ) Sell Fruit after the mission.
The Bus Assassination Vapid (BAWSAQ) Buy Vapid after the mission, wait for 2 days then sell it.
The Construction Assassination GoldCoast (LCN) Sell GoldCoast after the mission.

2 - High-Frequency Stock Trading

This is only effective if you already have a lot of money. The price of LCN stocks will refresh every 45 seconds - just use all your money to buy a stock, save the game and wait for it to refresh. If the price increases, sell... if it decreases, load the save.

GTA 5's Stock Market
GTA 5's Stock Market is called BAWSAQ, a parody of the real-life NASDAQ of America

3 - Augury Insurance

This is a car insurance company - its stock would go down if you destroy a lot of cars. Go around on a destruction spree then buy AuguryInsurance stock (AUG) for low. It would shot back later after your rampage is over.

AUGURY HQ
Augury's headquarter building in GTA 5

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4 - Radio Stock Tips

You should listen to talk-back radio stations. They often provide stock tips and investment based on them will always be accurate.

Radio station list
All radio stations in GTA 5

5 - Financier tips

This is a special hidden mission. You need to buy Tinkle (TNK) on the BAWSAQ. Switch to Michael and head to Hitch Lift 1 to find a guy on the side of the road. Pick him up and bring him to the airport - the guy would spill the beans about a particular stock along the way.

GTA 5
Pick up the financier

6 - List of Competing Companies

What's good for one company would affect its competitor negatively. If certain missions in the game affect one company, you should buy up the stock of its competitors prior to doing that mission. Below is a table for all rivaling companies.

Competitor 1  Competitor 2
CoolBeans BeanMachine
Burgershot Up-An-Atom
Clucking Bell TacoBomb
FlyUS AirEmu
GoPostal PostOP
Bilkington DollarPills
Pisswasser Logger
MazeBank BankOfLiberty
Redwood Debonaire
RadioLosSantos WorldwideFM
Bullhead Slaughter, Slaughter & Slaughter
eCola Raine
GruppeSechs Merryweather

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