Thomas E. Chestnut, Director at SOUTHWEST GAS CORP (SWX), sold 9,000 shares at $38.71 ($348K) on 2011-03-22, disclosed to the SEC on 2011-03-22.
Seasonal sale ($348k) by Director — this insider has traded SWX in March in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
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