Foreign bank deposits at the Federal Reserve have more than doubled to $715 billion from $350 billion since the end of 2010 amid Europe’s debt turmoil, buttressing the dollar’s status as the world’s reserve currency. Forty-seven non-U.S. banks held balances of more than $1 billion at the New York Fed as of Sept. 30, up from 22 at the end of 2010, according to a survey of 80 financial institutions by ICAP Plc, the world’s largest inter-dealer broker. The dollar has appreciated 6.7 percent since Standard & Poor’s cut the nation’s AAA credit rating Aug. 5, the second-best performance after the yen among ... (full story)