was down 16.2% in late trading after hitting a 52-week low of $7.06.

The Vancouver-based optical network company postponed its fourth-quarter earnings release, due after the close today, because of the West Coast earthquake.

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The stock had been lower most of the day, but it plunged sharply as the postponement was announced about 3 p.m. EST. 360Networks said it will release its results Thursday.