Market Vectors Solar Energy ( KWT) -2.0% PowerShares WilderHill Clean Energy ( PBW) -0.2% PowerShares DB Oil Fund ( DBO) -1.5% First Trust ISE-Revere Natural Gas Index Fund ( FCG) -1.6% Market Vectors Coal ( KOL)ETF -3.1% iPath S&P GSCI Crude Oil Total Return Index ETN ( OIL) -1.5% From coal to clean, much of the energy sector took a beating this past week. Oil managed to bounce back a bit towards the end of the week as the dollar headed back up. However, it was not enough to help black gold recover from the week's losses. Natural gas continued to spiral downwards. As I stated earlier this week, this trend is likely to continue unless a tragic Katrina-esque event sends prices back up. Coal, as predicted, headed south this week as Chinese mines reopened and suffocated the commodity's five month rally. iShares MSCI Mexico Investable Market Index Fund ( EWW) -1.5% iShares MSCI Brazil Index Fund ( EWZ) -3.1% iShares MSCI Chile Investable Market Index Fund ( ECH) -2.6% ETFs designed to track Mexico and other Latin American nations slumped this week following the uncertainty of the U.S. markets. UltraShort 20+ Year Treasury ( TBT) -5.6% TBT was the week's biggest loser as choppy markets sent investors back into the bond markets. As long as the U.S. remains on shaky ground it is likely that this fund will continue to fall as investors lean towards more conservative instruments to protect their investments.