Anxiety over a potential U.S. debt default has led some analysts to question whether the greenback's days as a global reserve currency are numbered. The U.S. government looked set to move into its 14th day of a shutdown on Monday, ramping up fears that the October 17 debt ceiling deadline could be missed prompting the world's largest economy to default on its debt obligations. (Read More: The World Needs a Second Reserve Currency: Choudhry) Richard Yetsenga, head of global markets research at ANZ, told CNBC Asia's Squawk Box that the recent political wrangling in Washington was hurting his already wavering faith in ... (full story)