More than a year after Moody's Investor Service announced that it was postponing the recalibration of its U.S. municipal rating scale amid the financial crisis, the agency may be close to announcing its plans to move forward on the changes once again.

Michael Adler, a Moody's spokesman, said yesterday that the agency intends as early as next month to provide an update on its plans to recalibrate its rating scale for muni securities to a single scale.

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