Northpoint Communications Group

(NPNT)

was down 10.6% to a 52-week low of $3.69 in early trading. The DSL company revised its third-quarter results after learning of a "deterioration in the financial resources" of certain privately-held customers.

Northpoint reduced revenue to $24 million from the $30 million previously reported and said its EBITDA loss for the quarter was revised to $79.2 million from the earlier $90.9 million.

Verizon

(VZ) - Get Report

, which agreed to take a 55% stake in Northpoint this summer, was down 0.2%.