] Covad Communications lost nearly half its value Thursday ] when federal regulators ruled to institute a three-year ] phase-out of the discounted network lines the company has ] enjoyed. The selling continued apace Friday. ] ] But some say the decline has been too steep. ] ] "The selling is absurd," said Vik Grover, an analyst at ] Kaufman Bros. "From my perspective, this is not a game ] ender, it's a game changer." Covad selling may be overdone |