International regulators and supervisors have started drawing up plans to make it far more expensive for investment banks to hold large volumes of complex financial instruments, such as mortgage-linked securities, in their trading books. The move is intended to prevent a recurrence of the type of massive, unexpected losses that emerged at banks such as UBS in recent months. The new measures, being spearheaded by the Financial Stability Forum – a committee of global regulators and supervisors – could force banks to rethink the business models they use to repackage assets such as mortgages into complex financial securities.
