VOOV is trading at $234.05, up 3.60% in pre-market, with no clear catalyst for the unusually large rise. - The move is out of step with modest index-futures gains. - Investors are watching September CPI, due at 8:30 a.m.; forecasts call for 0.6% monthly and 3.6% annual headline inflation. - Mixed bank earnings and weakness in financial shares offer no clear sector-wide explanation for VOOV’s jump.