Lufkin (LUFK) (NOG) (STR) (APA) (APC) Trade Mixed on Volatile Energy Day

On a volatile day for oil prices, shares of Lufkin Industries, Inc. (NASDAQ:LUFK), Northern Oil and Gas (Amex:NOG), Questar Corporation (NYSE:STR), Apache Corp (NYSE:APA) and Anadarko (NYSE:APC) closed mixed on the uncertainty following the death of Osama bin Laden.

Crude futures settled lower Monday after the death of Osama bin Laden stirred up oil markets, as traders attempted to measure the impact of the event on the stability in the Middle East.

Light, sweet crude for June delivery settled 41 cents, or 0.4%, lower at $113.52 a barrel on the New York Mercantile Exchange, in a volatile session that saw both two-and-a-half year highs near $115 a barrel and a decline to $110.82 a barrel.

Brent crude on the ICE futures exchange closed 77 cents lower at $125.12 a barrel.

Front-month June reformulated gasoline blendstock, or RBOB, settled 5.05 cents, or 1.5 percent down at $3.3479 a gallon. June heating oil settled 2.37 cents, or 0.7 percent lower at $3.2521 a gallon.

Anadarko closed Monday at $80.35, gaining $1.41, or 1.79 percent.