July 18 (Reuters) - Exxon Mobil has lost its arbitration challenge to block Chevron's $55 billion Hess acquisition deal, but the top U.S. oil producer managed to delay the tie-up by over a year, ...

Wall Street closed its third winning week in the last four with a quiet finish on Friday. The S&P 500 edged down by a whisper, less than 0.1%, after setting its all-time high the day before. The Dow ...