Long-dated US treasuries have returned more than the S&P 500 over a 30 year period for the first time since the 19th century.
Standard Life Investments' (SLI) Andrew Sutherland has revamped the £87m Strategic Bond fund by significantly raising his high yield exposure from 15% to 50%.
Bullish move by Standard Life Investments manager to profit from poor investor sentiment towards the space.
Stephen Snowden has upped risk on the Kames Investment Grade Bond fund by "aggressively" increasing exposure to banks and topping up high yield on the view the bottom of the market has already been reached.
Prime Minister David Cameron has warned that bankers caught manipulating the market to take advantage of QE can expect to face criminal prosecution.
Leading banks are at odds with European policymakers after lenders offered to take a haircut of 40% on their Greek bonds, but leaders said the proposals do not go far enough.