Oil Tumbles After Inventory Build

The energy exchange-traded funds -- the U.S. Oil(USO Quote) fund and the iPath Goldman Sachs Crude Oil Index(OIL Quote) -- were both losing 2.2% in recent action.

Turning to the energy complex, Fortis Bank upped its stock price target on Range Resources(RRC Quote) to $36 a share from $32 and reiterated a buy rating. The stock was recently down 0.5% at $27.62.

Elsewhere, RBC Capital Markets hit Whiting Petroleum(WLL Quote) with a downgrade, cutting its rating on the stock to underperform from sector perform. Shares recently were down 75 cents, or 1.8%, at $41.60.

Among the major energy companies, Exxon Mobil(XOM Quote) was losing 1.1%, while Royal Dutch Shell(RDS.A Quote) was down a fraction.