In what could spell a sweeping realignment of the home loan industry, a number of big lenders are looking to team up with either Fannie Mae or Freddie Mac rather than sell loans to both companies.

Bank of America's mortgage unit has agreed to sell the bulk of its new mortgages to Freddie Mac, the companies confirmed Friday. In March, Norwest Mortgage forged a similar pact with the McLean, Va., secondary market titan. And some industry experts predict that all of the top 10 originators will have signed similar deals with Fannie or Freddie by midsummer.

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