Credit default swaps, the derivatives instruments that have figured prominently in the global financial crisis, are now being blamed for playing a role in two bankruptcy filings this week.

Bankers and lawyers involved in restructuring efforts say they are concerned some lenders to troubled companies, such as newsprint producer AbitibiBowater and mall owner General Growth Properties, stand to benefit from a default because they also hold default swaps, which entitle them to payments in such events.