Stephanie P. Marshall, Director at TELLABS INC (TLAB), sold 15,450 shares at $4.67 ($72K) on 2011-05-19, disclosed to the SEC on 2011-05-23.
Seasonal sale ($72k) by Director — this insider has traded TLAB in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.