GLOBAL MARKETS-Stocks extend rally with oil; eyes on EU summit

* Wall Street little changed after mixed earnings* Oil boosted as Iran voices support for output freeze
* Dollar capped vs yen after Fed Bullard’s dovish comments (Updates with U.S(Other OTC: UBGXF – news) . market, changes dateline from previousLONDON)
By Rodrigo Campos
NEW YORK, Feb 18 (Reuters) – A gauge of stocks across theglobe extended its best run of the year on Thursday, with higheroil prices supporting risk assets even as earnings in Europe andthe United States limited