The question I should have asked is not what is the rule, but what is the principle.
I lost my moral compass and I have done terrible things that I very much regret.
Mark-to-market accounting is like crack. Don't do it.
I believe I was extremely greedy.
I wish I could undo what I did at Enron but I can't. I understand that I deserve punishment. Your honor, I accept the prison sentence that you are about to impose and will serve it without bitterness.
There are people who look at the rules and find ways to structure around them. The more complex the rules, the more opportunities.