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.