Stocks rose on Monday, helped by corporate merger news. Chip maker RF Micro Devices jumped 21 percent after saying tht it would buy TriQuint Semiconductor for about $1.56 billion. Meanwhile, Jos. A. Bank rose 9 percent on Men’s Wearhouse’s increased buyout offer. Markets also got a lift as turbulence in the Ukraine eased following the ouster of President Viktor Yanulovych over the weekend. Investors had been worried about the escalating violence. Investors will have a chance to test record highs after durables and GDP reports come out this week. And Fed chair Janet Yellen is expected to testify to the Senate Banking Committee Thursday.