Zhengzhou Commodity Exchange (ZCE) is one of the only three future exchanges (inc. Nairobi is home to the Nairobi Securities Exchange (NSE), one of Africa's largest stock exchanges. Futures are traded on regulated commodities exchanges. USO invests in oil future contracts that are traded on regulated futures exchanges. NGO international exchanges and cooperative activities had increased. By 1993, NIIT began trading NIIT stocks on the Indian stock exchanges. Bitcoins can be bought on digital currency exchanges. Japan retaliated by trying to isolate North Korea by cutting trade and other exchanges. This is a list of notable futures exchanges. Plans were made to list Bugatti shares on international stock exchanges. Novatek is a public company with shares traded on the London and Moscow stock exchanges. Their exchanges, commentaries, and messages increased. There are many stock exchanges within Europe. The WSE is a member of the Federation of European Securities Exchanges. They focused mainly on microeconomics and on local exchanges between individuals.