document: Industry insiders loading up on cheap company stock A surge of telecom executives and directors purchasing their own companies , stock in the last two months points toward a renewed optimism in the beleaguered sector , say some observers , who view the rash of insider buying as a vote of confidence from management . Airgate PCS , Charter Communications , Cox Communications , Crown Castle International , Nextel Communications and Nortel Networks all have seen infusions of insider investment this summer , echoing trends in both the telecom industry and the national economy
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