LONDON: Moody’s has maintained its deep junk ‘Caa3’ credit rating for Greek government debt, but has upgraded its outlook following recent political breakthroughs. “Moody’s Investors Service has today confirmed Greece’s government bond rating at Caa3 and changed the outlook to stable,” the agency said on Friday. Moody’s cut its credit rating for Greece to deep-junk — jut two steps above ‘default’ — in July.