Thank you so much TomD8! Very helpful. I am slightly confused about the article in the 1st link. In my case, the FMV when I gift it to my son would be more the original cost basis. For e.g. if the value was a) $100 they vested for me, b) FMV is $150 when I gift to my son, and c) the value becomes $175 when he sells them: Would he also have to pay the tax for the $50 gain that happened when the stocks were with me, or will he only pay the tax on the $25 gain after he received them, or will he have to pay the tax on $75 for the entire time after vesting? Sorry that I didn't understand..
