[quote author="sad.machine" date=1252557954]Take an etf like UYG
I am thinking of investing in it long term with a lot of my savings. However, what if it moves under a dollar? Isn't there some type of rule about that and where it is taken off the NYSE? Could this ETF ever 'go under'?</blockquote>
I was in UYG for a week and made a nice profit off of a short term move up.
However, most leveraged ETF's are NOT for long term investing, they are typically for people who have a time frame of a few days or hours. Many of the leveraged ETF's also have a problem with tracking the underlying index they are based on, because they reset at the end of the day, or you get into issues of contango with some of the energy ETF's, which makes things even more confusing for someone with a long term horizon.
You need to do a tremendous amount of research if you're thinking about ANY of these leveraged ETFs. Some of them HAVE gone under. This is not a "set it and forget it," type of investment. There are far better vehicles to invest in for a "safe" play than a UYG, especially when you are talking about investing/risking your hard earned savings.