Updated from 11:04 a.m. EDTShares of major integrated oil companies closed lower on Monday, in tandem with a drop in the broader market and crude oil's decline. Light, sweet crude oil for May delivery on the New York Mercantile Exchange settled at $48.41, down $3.97, or 7.6% a barrel. BP ( BP) closed at $39.43, down $1.48 or 3.62% ConocoPhillips ( COP) finished at $39.02, down $1.31, or 3.25. Chevron ( CVX) finished at $66.80, down $2.10 or 3.05%. Exxon Mobil ( XOM) closed at $68.63, down $1.35 or 1.93%. Petro China's ( PTR) American depositary shares closed at $79.18, down $5.81 or 6.84%. Shares of Royal Dutch Shell ( RDS.B) ended at $43.15, down $1.83 or 4.1%.