Two solar energy ETFs, two natural gas ETFs and one VIX ETN made the list: Number 5: Market Vectors Solar Energy (KWT)Inception Date: 4/21/2008Total Return Since Inception: -90.42%Assets Under Management (4/12/12): $12.69 millionTotal Inflows Since Inception: $64.02 million Number 4: Guggenheim Solar (TAN)Inception Date: 4/15/2008Total Return Since Inception: -90.48%Assets Under Management (4/12/12): $61.53 millionTotal Inflows [...]