Monday Sector Laggards: Oil & Gas Refining & Marketing, Biotechnology Stocks

In trading on Monday, oil & gas refining & marketing shares were relative laggards, down on the day by about 1.4%. Helping drag down the group were shares of Vertex Energy (VTNR), down about 7.6% and shares of Pacific Ethanol (PEIX) off about 7.5% on the day.