Chevron closed its $55 billion acquisition of Hess on Friday after winning a landmark legal battle against Exxon Mobil to gain access to the largest oil discovery in decades.

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, ...