Gary J. Spies, Director at OTTER TAIL CORP (OTTR), bought 3,500 shares at $15.97 ($56K) on 2009-03-04, disclosed to the SEC on 2009-04-14.
Seasonal purchase ($56k) by Director — this insider has traded OTTR in March in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.