The ADX General Index ended half a percent lower at 2,704.47 as energy, real estate and bank stocks posted losses. Arkan Building Materials lost the most, finishing off 8.27% at Dhs1.22. Abu Dhabi National Energy Co. dipped 1.63% to Dhs1.21. Aldar Properties lost 1.57% and closed at Dhs1.24. Earlier in the day, Aldar announced thatits real estate project Al Bandar Marina, a new Marina at the heart of the Al Bandar residential community in Abu Dhabi, has been awarded the Gulf region's first Blue Flag certification, a volunteer eco-label administered by the Foundation for Environmental Education (FEE) for marinas and beaches around the world that works towards sustainable development.