According to this Bloomberg article the HSI are poised to announce that they will include secondary listings and weighted shares in the index. I've no idea the time scale, but once the process of adding these companies is complete the index could look dramatically different. Tencent, Baba, Xiaomi, Ant Financial, JD.com, Meituan Dianping...that's six off the top of my head, could all be in the top 10. Currently tencent are the only tech company in the top 10. Would certainly make the Tracker fund a lot more attractive (IMO).