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What are cash-settled options?

In one line: Cash-settled options settle in cash at expiry, with the in-the-money amount credited or debited to your account, instead of 100 shares changing hands; most index options, such as SPX, settle this way.

Trading glossary · Updated 2026-10-26

How it works

When a stock option is exercised, shares move. A short put means you buy 100 shares; a short call means you sell them. That's physical settlement.

A cash-settled option skips the shares. At expiry, the clearing house works out how far in the money the option finished and moves that amount in cash. Out of the money, nothing happens. In the money, the holder gets the difference and the seller pays it.

Most index options settle this way: SPX (the S&P 500 index), NDX, RUT and the smaller XSP. You can't own "100 shares of an index", so cash is the only way. They're also usually European style, so no early Assignment. The ETFs that track the same indexes, like SPY and QQQ, are Physically settled options with shares.

The wheel strategy depends on shares arriving after assignment. With cash-settled options there are no shares, so there's no second half of the wheel. You just take the cash result.

An example (hypothetical)

An illustration, not a trade idea. Say a made-up index, XIX, sits at 5,000. You sell a 30-day 4,800 put for $20.00, collecting $2,000. The Contract multiplier is 100, so one point is $100.

No shares arrive to hold for a recovery. The loss is settled in cash and it's final. Index puts are large contracts: the 4,800 strike represents $480,000 of index value, which is why the cash swing is so big.

Why it matters for sellers

Cash settlement changes the habits that make the wheel work:

• No "I'll just hold the shares". A losing index put is a cash debit, not an inventory you can wait on or sell calls against.
• No early assignment, since these are mostly European style. The trade can only be decided at expiry or by closing it.
• Settlement timing differs. Monthly SPX options settle on the morning of the third Friday from an opening-price calculation; the weeklies settle at the close. Check the exact rule for the product you trade.
• Taxes can differ. In the US, broad-based index options may fall under different tax rules than stock options. Ask a tax adviser.

A practical note on size: a single SPX contract is about ten times a single SPY contract. XSP is the smaller version. Sellers who move from stocks to indexes should recompute the loss at a 10% drop before anything else.

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