AFP/Getty Images Is the market at a standoff with the bull?The story of Juan José Padilla must be legend within the Spanish bullfighting community. Blinded by a bull in one eye in late 2011 after badly losing his footing in a bullring, the matador made a stunning comeback to the arena about six months later, much to the utter shock of fans. Similarly, Wall Street investors find themselves facing off with a bull of their own, one that is in its ninth year and, despite being beset by a cavalcade of concerns, appears on the verge of resuming the second-longest run since WWII. That is perhaps much to the consternation of bears and the confusion of nervous optimist alike. On Friday, the 13th no less, the S&P 500 index SPX, +0.11% finished above 2,800 for the first time since Feb. 1, piercing a psychological, round-number level that had proven a source of key resistance for the market since it stumbled badly into correction territory on Feb. 8.via