nyseTraderBefuddledU.S. equities fell deep into negative territory Monday on worries about a potential Greece exit from the eurozone and plunging euro. As of 1:15 p.m. ET, the Dow Jones Industrial average shed 324 points, or 1.82%, to 17508. The S&P 500, meanwhile, dropped 37 points, or 1.80% to 2021, while the Nasdaq fell 69 points, or 1.47, to 4656. All ten S&P 500 sectors were in negative territory, with the energy sector leading the way, down 4.29%. U.S. shares were responding to bad economic news from across the Atlantic: the euro slumped to a nine-year low on Monday as investors responded to concerns that inflation across the region will turn negative and increasing political uncertainty in Greece, all of whicdh could force the European Central Bank to unleash quantitative easing. For the Dow and S&P it was the largest drop in nearly a month. The S&P 500 is down for a fourth consecutive day.  If the S&P finishes down during today’s session it will be the longest losing streak for the benchmark index in more than a year. More