Loan T. le Duy, Director at NATIONAL INSTRUMENTS CORP (NATI), bought 519 shares at $41.48 ($22K) on 2018-05-23, disclosed to the SEC on 2018-05-25.
Seasonal purchase ($22k) by Director — this insider has traded NATI in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
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