Brent crude headed for its third weekly loss this month amid speculation that plentiful oil supplies will cushion the market against unrest in the Middle East. West Texas Intermediate was steady in New York. Futures were little changed in London and down 1.5 percent this week. The broadest Arab-U.S. military coalition since the 1991 Gulf War struck Islamic State targets in Syria, while in Iraq , fighting has largely spared the south, home to three quarters of supply from OPEC’s second-largest crude producer. Saudi Arabia will keep supplies steady the rest of the year, a person with knowledge of the kingdom’s policy said. “I don’t think the geopolitical issues are as relevant these days,” Frank Klumpp, an analyst at Landesbank Baden-Wuerttemberg, said by e-mail. “There’s not much market reaction to the fighting in Iraq as it’s considered that the oilfields in the south aren’t in danger. The most important […]