Cash Index CFDs vs Index Futures: What Is the Difference?

A cash index, sometimes called a spot index, tracks the current level of the index right now. A cash index CFD lets you trade that level directly. An index future is a contract to settle the index at a set date in the future. Futures trade on regulated exchanges and come in monthly or quarterly contracts with fixed expiry dates. Each contract has a code that names its expiry month, so traders always know which one they hold. The prices track each other because they follow the same benchmark, but the future's price also reflects the cost of holding the position until expiry. That gap between the cash price and the future's price is normal and narrows as expiry approaches. By the expiry date the two prices converge, since the future then settles at the index level itself. Until then, the difference reflects things like interest rates and expected dividends over the life of the contract.

This is the biggest practical difference. An index future has a fixed expiry date. If you want to keep the position past that date, you have to roll it. Rolling means closing the expiring contract and opening the next one. That takes attention and can involve extra cost each time. Miss the roll and your position can be settled without you meaning to close it. A cash index CFD has no expiry. You can hold it for as long as your margin supports it without rolling to a new contract. That makes cash CFDs simpler for traders who do not want to track expiry calendars. There is no diary entry to keep and no contract code to watch. The trade-off is how you pay for that convenience, which comes down to financing.

With an index future, the cost of carry is built into the contract price rather than charged separately. You do not usually pay a daily financing fee, but the future's price already reflects the cost of holding to expiry. With a cash index CFD held overnight, financing is applied as a swap charge or credit for each night the position stays open. The longer you hold a cash CFD, the more those overnight charges add up. So the two structures suit different holding periods. For very short-term trades closed the same day, overnight financing on a cash CFD does not apply, so the cost picture is simple. You pay the spread and nothing more for holding. For positions held over weeks, a trader needs to weigh the running swap on a cash CFD against the rollover cost on a future. Neither is automatically cheaper. It depends on how long you stay in and how the two costs compare over that window.

Cash index CFDs tend to suit shorter-term and intraday traders who want to open and close quickly without tracking expiry dates. No rollover means less admin. Index futures are often favoured by traders who hold longer, want exchange-traded contracts, and are comfortable managing rollover. Futures also have standardised contract sizes set by the exchange, while CFD sizing is more flexible and can go smaller. That smaller sizing is one reason cash CFDs are common with retail traders who want to control risk in tighter increments. Both are leveraged, so both carry the same core risk that losses can build faster than on an unleveraged position. The right choice depends on how long you hold, how much admin you want, and whether you prefer the flexibility of a cash CFD or the fixed structure of an exchange-traded future. There is no single answer that fits every trader, so match the tool to your own holding period.