be careful with commodity funds. If you are referring to the ETF futures, these are fund that based on commodities and is not mean to keep long term. ( E* ~4 M& p8 o# t! k9 g3 e: c& l$ D; k) a# |: B
If you want to invest in energy, it would be best to invest into companies that produce these commodities, not the future of these actual commodities..