The Obama administration's $75bn effort to help troubled homeowners avoid foreclosure has hit a stumbling block: a fight over how to aid borrowers who have more than one home loan.

The Treasury Department, scrambling to address the problem, is trying to persuade lenders to forgive or greatly reduce so-called second liens. But that effort has sparked a fight between investors who own securities backed by first mortgages and banks that hold second mortgages over how losses should be shared.

A failure to resolve the impasse could blunt the impact of President Barack Obama's housing plan, which is designed to tackle one source of the financial crisis -- the spiral of foreclosures and falling home prices. About half of seriously delinquent borrowers have a second mortgage debt, according to Credit Suisse.

Wall Street Journal