Investors in the listed property stocks will soon have a benchmark index to enable them to track the performance of the world's emerging markets for the first time. The European Public Real Estate Association (Epra) announced at its annual conference in Stockholm on Thursday that the FTSE EPRA/NAREIT Global Real Estate Index series is to be expanded to cover 20 developing countries. The bulk of the emerging markets index series will made up by the future economic heavyweights known as the 'BRIC countries', Brazil, Russia, India and China.