National Presto Industries, Inc. (NYSE:NPK – Get Free Report) saw unusually-high trading volume on Tuesday . Approximately 14,019 shares traded hands during mid-day trading, a decline of 31% from the previous session’s volume of 20,242 shares.The stock last traded at $81.68 and had previously closed at $78.24. National Presto Industries Trading Up 1.1 % The […]