Markets open marginally lower; financials weigh: Benchmark indices have snapped two-day winning streak and have opened flat with a negative bias weighed down by financials tracking mixed global cues as investors remain wary regarding Greece debt crises. At 9.25 AM, the Sensex is down 60 points at 27,627 and the Nifty is quoting at 8,352 mark down by 21 points. Asian shares edged down on Tuesday as worries over Greece's fiscal woes took some of the shine off Wall Street's record close, helping steer the dollar higher and undermining the euro. Fears of a Greek bankruptcy persisted even as the country's finance minister said on Monday that it was close to a deal with its lenders that would help it meet debt repayments next month. The Indian rupee opened with marginal loss of 8 paise at 63.79 per dollar against previous close of 63.71.