Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Are there common stock price trends related to employee option plans?
Say I am an employee of Facebook and I will be able to sell stares at enough of a profit to pay of my mortgage and have enough money left to cover my living costs for many years. I also believe that there is a 95% chance that the stock price will go up in the next few years. Do I take a 5% risk, when I can transform my life without taking any risk?   (The USA tax system as explained by JoeTaxpayer increases the risk.)  So you have a person being very logical and selling stocks that they believe will go up in value by more than any other investment they could have.   It is called risk control. (Lot of people will know the above; therefore some people will delay buying stock until Lock Up expiration day hoping the price will be lower on that day.   So the price may not go down.)