Karachi stock market witnessed mixed trend on Friday as the benchmark 100 index lowered by 3 points.The business activities started in positive zone on last business day of the week, however, watchful attitude of the investors caused the market to remain volatile. The KSE-100 index closed at 9150, down 3 points with trade volume of 195 million shares. Tele Card remained volume leader with 24.5 million shares.