MARKET PULSE-US stocks to watch: Chesapeake, Halliburton, Berkshire By: Reuters: Company News April 18, 2012 at 13:01 PM EDT April 18 (Reuters) - Some U.S. stocks to watch on Wednesday: Read More >> Related Stocks: Amphenol Corp A Berkshire Hathaway CME Group Chesapeake Energy Exxon Mobil Halliburton Co Illumina Inc Pfizer Polaris Inc Rogers Corp St. Jude Medical Starbucks Corp