With your indulgence, I've been researching the situation of a liberal in my acquaintance, who was reimbursed in stock rather than salary a couple of years ago. (This guy has donated big sums to ACLU, Am Int'l, Planned Parenthood and various Dems whom I have opposed...). This stock has tanked. Is he in good shape with AMT, or bad? Does the ACLU get lucky next year?
I'm not a tax professional; I just happen to have personal experience with the AMT. I know it applies with incentive stock options (ISO's), and other special income situations, and I also know the calculations are fairly convoluted... If your friend thinks he may be subject to AMT, he should definitely consult a CPA who's up-to-speed on AMT.