Defense stocks lifted Wall Street to begin the week after Donald Trump's first leg of a trip abroad resulted in billions of dollars' worth of deals. Crude oil also rallied after of an OPEC meeting later in the week. Dow Jones IndustrialAverage component Boeing (BA) - Get Report boosted the blue-chip index after Trump's weekend of deals. Saudi Arabia has agreed to buy a series of new aircraft, weapons systems and helicopters. Qualcomm (QCOM) - Get Report rose after JPMorgan raised its rating to OVERWEIGHT from NEUTRAL. The firm has high hopes for its pending $47 billion acquisition of NXP Semiconductor (NXPI) - Get Report . That deal is expected to close by the end of the year. Barclays upgraded its rating on Mylan (MYL) - Get Report to OVERWEIGHT from EQUAL WEIGHT and increased its price target by $3 to $50. The firm is optimistic its generic version of a multiple sclerosis treatment will be approved.