Brent edged up on Friday while U.S. crude eased, but both were stuck in tight ranges as investors focused on talks aimed at averting a Greek debt default. Brent crude for August delivery was up 21 cents at $63.41 a barrel by 0646 GMT (0246 EDT) after ending the previous session down 29 cents, or 0.5 percent. U.S. crude for delivery in August fell 7 cents to $59.63 a barrel after finishing Thursday down 57 cents, or almost 1 percent. “Traders and investors are very much on tenterhooks on the outcome,” said Ben Le Brun, a market analyst at OptionsXpress in Sydney, following another failed round of talks to finalize a cash-for-reform pact for Greece. Euro zone finance ministers are due to meet on Saturday in a last-ditch attempt to clinch a deal with Greece to avoid a debt default by Athens and possibly a Greek exit from […]