A graphic comparison of Friday mid-day action. USO is the United States Oil Fund, PBW is the PowerShares WilderHill Clean Energy ETF. From Schaeffer's Research:
...Most of the sector action is quiet as well. Today's strongest group is the US Oil Fund (USO). The PowerShares Clean Energy ETF (PBW) is the weakest area. Those are the only two areas from my list to move 1%.