Asias Currency Markets on Edge as Oil Prices and Dollar Strength Test Foreign Exchange Reserves Leonardo Secures 320 Million Naval Defense Contract with Kuwait Warren Buffetts Tiny Purchase in March May Have Appeared in Berkshires Latest Filing Mark Cuban Warns Healthcare Conglomerates Abuse Power Calls for Antitrust Enforcement Oil Prices Post Weekly Decline as USIran Talks Show Potential Progress Amazon Reports Record Thanksgiving Holiday Week Sales Highest Number of Items Sold Pfizer Wins Singapore Trademark Dispute with Merck Over Vaccine Brand