The public issue of Quadrant Future Tek, Punjab-based railway equipment maker, opened for public bidding today. The Rs 290 crore issue is fully a fresh issue of 1 crore equity shares with a price band of Rs 275-290 per share. On Monday, the Punjab-based firm raised Rs 130.5 crore from 15 institutional investors via anchor book on January 6, a day before the IPO opening.