[quote=ucodegen]
ETFs are not a commodities, but they are taxed the same as stocks on gain (long term vs short term). [/quote]
It is actually more complicated than that. If an ETF holds commodities (e.g. Gold ETF – GLD), all capital gains are short term, regardless of how long you hold it.
Some commodity ETFs are structured as partnerships which means you get a K-1 and can have all the fun you want with it.