City Index | 5,302 followers on LinkedIn. As a Global Leader in FX & CFD trading, as well as Spread Betting (UK only), City Index provides competitive spreads and access to thousands of markets worldwide through a combination of innovative trading technology and excellent customer service. We also offer a demo trading account to help you build up your confidence and test out your trading strategies at your own pace without putting your capital at risk. StoneX Financial Ltd is a wholly-owned subsidiary of StoneX Group Inc CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 71% of retail investor accounts lose money when trading CFDs with this provider.