Quick note: Subscribe to the forthcoming Fortune Gulf Brief. Every Tuesday, this new newsletter will deliver clear-eyed, authoritative intelligence on the deals, decisions, policies, and power shifts shaping one of the world’s most consequential regions, written for the people who need to act on it. Sign up here. THE MARKETSStocks are mixed in reaction to yet another oil price spike S&P 500 futures were flat this morning. The index sank 0.49% yesterday.  In Europe, the Stoxx 600 declined 0.35% in early trading and the U.K.’s FTSE 100 was down 0.65% before lunch. Asia: South Korea’s KOSPI was up 0.75%. Japan’s…