(Bloomberg) -- The record bond-buying by global central banks has swollen their balance sheets, with the Federal Reserve, European Central Bank and the Bank of Japan holding $12.7 trillion in government debt, loans and other assets. The People’s Bank of China is somewhat of an exception. Its total assets have declined about 10 percent from October 2014 as it spent reserves to prop up a weakening currency.To contact the reporter on this story: Enda Curran in Hong Kong at ecurran8@bloomberg.net. To contact the editors responsible for this story: Jake Ulick at julick@bloomberg.net, Malcolm Scott