good article.....
https://www.etftrends.com/2017/01/the-uranium-etf-is-exploding/ The Global X Uranium ETF tries to reflect the performance of the Solactive Global Uranium Total Return Index, which is comprised of global uranium miners, including a 21.5% tilt toward Cameco and 11.8% in NexGen Energy. Country weights include Canada 56.5%, Australia 16.0%, Hong Kong 8.0%, U.S. 7.9%, France 6.6% and China 4.9%.