In the last few days had you sold call options you would be in trouble since they called then as soon as they could to force you to buy and squeeze you I am glad we have the SEC to protect us, lol
my mistake, I meant "exercised".. usually you'd get a short position, but there were no shares available so you were forced to buy
TVIX already collapsed as Credit Suisse decided to issue new units. It was trading at 80% premium to NAV When will GAZ collapse to $2.44 ? It is still trading at $4.57.
That's what everyone's betting on... http://www.etftrends.com/2012/03/focus-turns-to-natural-gas-etn-premium-after-tvix-crash/