Shares gained in Asia on Friday, though many markets in the region were closed for May Day holidays. Brent crude’s price held steady at $111. 66 per barrel while U. S. benchmark crude oil added 46 cents to $105. 53 a barrel. Prospects for a deal to cement a three-week ceasefire in the Iran wa r remained clouded as Iran’s supreme leader said it will protect its nuclear and missile capabilities as a national asset. In Tokyo, the Nikkei 225 gained 0. 7% to 59,687. 65 as the Japanese yen the U...