“Jaime Caruana, head of the Swiss-based financial watchdog, said investors were ignoring the risk of monetary tightening in their voracious hunt for yield.  Mr Caruana said the international system is in many ways more fragile than it was in the build-up to the Lehman crisis. Debt ratios in the developed economies have risen by 20 percentage points to 275pc of GDP since then. Credit spreads have fallen to to wafer-thin levels. Companies are borrowing heavily to buy back their own shares. The BIS said 40pc of syndicated loans are to sub-investment grade borrowers, a higher ratio than in 2007, with ever fewer protection covenants for creditors.”