Every index here is a cash CFD tied to the spot level of the underlying. No expiry rollover anxiety like futures, no contract-month switching, no last-trading-day surprises. The position you hold tomorrow is the position you held today, marked at the same spot price your broker sees on the venue.
Fractional sizing means you can take a 1.00 lot NAS100 hedge against a portfolio without buying fifty shares of QQQ. Sub-lot orders down to 0.01 let you scale into the open print and scale out of the close auction with surgical precision.