Wow, that's really a pickle, let me just take out my biz law textbook to help you out here blows dust okay, so according to Singapore's Securities and Futures Act (which prohibits insider trading) under section 219, people who are not connected to the corporation who recieve price -sensitive information will fall under this act, which means you . Even if you pass this information to another friend, who tells a stranger at a bar, who then buys that stock, that stranger will still be liable for violating the Securities and Futures Act for insider trading. So your dad, you and of course your dad's friend will all be liable for insider trading if found out. I highly suggest to politely decline participating in this and talking your dad out of it - you are looking at possible criminal liability - you will be charged in court and if convicted, be deemed a convict. Under section 221 you will be looking at a max fine of $250 000 or imprisonment of up to 7 years. If you're lucky to get off with a lighter civil liability, you are still looking at a penalty of 3 times the profits gained, or $50 000, whichever is greater. I got this all off "introduction to business law in Singapore" by ravi chandran 4th edition. If you don't believe me, buy the book, check page 278 -280. It's cheaper than getting fined 50k and going to jail for 7 years.