[20Four7]

I knew Nortel employee's who were counting their days till retirement when the stock was $120 a share. They are all still working there as no one got out and most continued to buy during the high side as employees. The only time to go all in is "if" your playing poker and your holding the nuts. Even then you might still get drawn out on and presumably your whole roll isn't on the table. Even with a 100% arb you shouldn't go all in mostly due to the difficulty of moving money around and the cost of moving money around. And a 100% arb is guaranteed.