Bankers are growing increasingly anxious about the $ 1.1 trillion of prime mortgage loans and securities , much of which they held on to themselves , assuming it to be bombproof .

银行家们则越来越担心1.1万亿美元的优质按揭抵押贷款及其相关证券了，因为这些贷款及证券都由他们自己持有并以为这些贷款是刀枪不入。

As regulators around the world try to work out how to bombproof the financial system , dealing with the problem of " too big to fail " is the most vexing issue .

全世界的监管机构正在努力解决怎样保护金融体系，因此处理“大到不能倒”的问题成了最恼人的事情。