Market Roundup

Shares of Ameron International Corp AMN gained about 27% after National-Oilwell Varco Inc NOV announced its plans to pay $85 per share in cash to acquire Ameron in a deal valued at $772 million. The purchase price values AMN at 28% premium over its closing price of $66.27 per share on Friday. Shares of Western Union Co WU dropped about 3% after the company announced its plans to buy the Travelex Global Business Payments division of Travelex Holdings for 606 million British pounds, or around $976 million. The deal is likely to close in late 2011. Shares of AutoNation Inc AN fell about 0.2% after the company reported a 3% y/y rise in its June retail new vehicle unit sales. AutoNation's retail new vehicle unit sales in June came in at 16,564 units. AutoNation's retail new vehicle unit sales in June for domestic segment surged 18% to 5,638 from June 2010. AutoNation reported 1% drop in its Q2 retail new vehicle unit sales. Shares of Marathon Oil Corporation MRO rose about 2.5% after the company elected Linda Z. Cook to the Company`s board of directors, effective July 1, 2011.