| What are you trading? | A contract tied to a stock-market index. | A perpetual contract tied to an index reference price. | Shares bought outright in a cash account. | A perpetual contract linked to a stock’s price. |
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| Do you own shares? | No ownership of the index’s companies. | No ownership of the index’s companies. | Yes. A share represents company ownership. | No shareholder ownership or voting rights. |
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| Does it expire? | Yes. Each contract has an expiry. | No scheduled contract expiry. | No contract expiry. | No scheduled contract expiry. |
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| What costs matter? | Trading fees, spread, and rolling to a later contract. | Trading fees, spread, and funding payments. | Broker fees, spread, and possible currency/account charges. | Trading fees, spread, and funding payments. |
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