DUBAI, Oct 26 (Reuters) - Here are some factors that may affect Middle East stock markets on Sunday. Reuters has not verified the press reports and does not vouch of their accuracy.INTERNATIONAL/REGIONAL* GLOBAL MARKETS-Shares post best week since mid-2013 after earnings boost MKTS/GLOB* Brent oil ends week flat, pausing rout, as U.S. contango looms O/R* Gold posts weekly loss on dollar rise, stro