The energy sector finished the day lower, logging its worst session this year, after stalled debt negotiations in Greece, some disappointing economic news and reports that S&P downgraded a handful of Italian banks. In the latest round of disappointment from the euro zone, ratings agency S&P downgraded 34 of 37 Italian banks, citing worries over the banking industry and economic risks in the country.WTI crude oil closed at $98.67 down $1.17 or 1.17% falling for the first time in four sessions after the latest effort in Greece to adopt austerity ...