March 10 (Reuters) - Allied World Assurance Company Holdings Ltd AWH.N
* On behalf of certain of its clients, signed a letter of commitment with Fairfax Financial
* To invest US$500 million in order to indirectly acquire just over 10 pct of issued and outstanding shares of Allied World Assurance Source text for Eikon: ID:nPn5k6zkha Further company coverage: AWH.N