I was wondering about these leveraged ETFs. Can the long ones of these go to Zero? I don't really understand how they work, I just trade them. UYG is way down at about $1, if the leveraged holdings got to net zero, does UYG just disappear from listing? Or does the company that puts it out go bankrupt? How does it work? Is this something to buy a few hundred dollars worth in an IRA account at $.50 and just hold it til they go back up to $60 or where ever they were a year ago?