An index CFD is a type of contract for difference (CFD) that enables you to go long and short on global index markets. Like other types of CFD, they work using contracts that track the live price of their underlying market. In this case, that market is a stock index.
The CFD you trade entitles you to exchange the difference between the index’s price from when you open your position to when you close it. Buy one UK 100 CFD at 7000 and sell it at 7100, and you’ll make a £100 profit. If the UK 100 falls to 6900, you’ll make a £100 loss.
Learn more about how CFDs work.