SPY vs SPX vs XSP Options: Which One Should You Trade?

If you want to trade options on the S&P 500, you've got three main choices. SPY options are on the SPY ETF. SPX options are on the index itself. XSP options are on a mini version of the index, a tenth of its size.

They all rise and fall with the same 500 companies. But they're different contracts. They differ in size, in how they settle, in what a trade really costs and in how gains are taxed in the US. We pulled the closing quotes for all three on 30 October 2026 and checked every fee.

SPY vs SPX vs XSP at a glance

How big is one contract?

Every one of these contracts covers 100 units of what it's on. On 30 October 2026 the S&P 500 closed at 7,580.07, so one SPX contract covered $758,007 of the index. That's the number your profit and loss moves with.

XSP is the same index divided by 10. It closed at 758.01, so one XSP contract covers $75,801. Ten XSP contracts equal one SPX.

SPY closed at $755.72, so one SPY contract covers $75,572. That's close to XSP but not the same. SPY sat 0.3% below a tenth of the index. It's a fund, not the index: it charges a 0.0945% fee and pays out its dividends every quarter, and both keep its price a little under the index.

What a trade really costs

Two things cost you money on every option trade. The first is the spread: the gap between the price buyers bid and the price sellers ask. Buy at the ask and sell at the bid, and you've paid one full spread to get in and out. The second is fees: your broker's commission plus the exchange's fee.

We took every call and put struck within 1% of the price and found the middle spread for three expiry dates. Then we priced the same exposure in each: one SPX contract against ten SPY or ten XSP.

For the next day's options, ten SPY and one SPXW cost the same: $40 in spread. Further out, the single SPXW contract was cheaper: $90 against $120 at three weeks. XSP was the most expensive every time, at $120, $335 and $245.

Notice the AM-settled monthly SPX. On the same expiry date its spread was about twice the SPXW one: $1.90 against $0.90. Same index, same date, but the AM contract was simply quoted wider.

Now the fees. SPY options cost nothing at the exchange for a retail customer. Cboe charges $0.45 a contract on SPX when the option costs $1 or more, and $0.07 on XSP orders of 10 contracts or more. Orders of fewer than 10 XSP pay no Cboe fee. Your broker adds its own charge on top.

Fees are small next to the spread. Add them up at Robinhood and the next day's options cost $40 for ten SPY, $42 for one SPXW and $131 for ten XSP. At this size XSP cost about 3.1 times as much as the others for the next day, and 2.9 times as much at three weeks.

Smaller trades flip the picture. If you're buying a single contract, there's no one-tenth SPX. Your choice is one SPY or one XSP, and SPY wins: a $0.04 spread is $4 in and out, against $12 on XSP. Robinhood charges nothing on the SPY contract and $1.00 on the XSP one.

American vs European: can you be assigned early?

SPY options are American-style. Whoever owns one can exercise it on any trading day. If you've sold one, you can be assigned at any time, and you'll find out the next morning.

It happens most around dividends. SPY last paid $1.89 a share, or $189 a contract, going ex-dividend on 18 September 2026. If you've sold a SPY call that's in the money, the buyer may exercise it the day before to collect that dividend. You'd wake up short 100 shares and owe the $189.

SPY options also settle in shares. Hold a call that's in the money at expiry and it's exercised for you: you buy 100 shares, about $75,572 of SPY. Plenty of accounts can't pay for that, so the broker may close your position for you in the last hour.

SPX and XSP are European-style and settle in cash. Nobody can exercise them before expiry, so you can't be assigned early. At expiry the difference between the strike and the settlement price is paid in cash, and no shares change hands.

The AM settlement trap

Most SPX options settle at the 4 p.m. close, like SPY and XSP. The exception is the classic monthly SPX option that expires on the third Friday. It stops trading at Thursday's close. Its final value is then set from each stock's opening price on Friday morning.

So if you hold one into Thursday's close, you're carrying an overnight move you can't trade out of. We measured that move into every monthly expiry since January 2010, using SPY's Thursday close and Friday open. That's 196 expiries.

The typical move was 0.30%. On one SPX contract at today's level that's about $2,274, up or down, after the market closed on you. The move was bigger than 0.5% 47 times and bigger than 1% 15 times. The worst was a 2.69% drop on 15 January 2016, about $20,390 on one contract today.

The fix is simple: close the position on Thursday, or use the SPXW contract with the same Friday date, which settles at Friday's close. Check the symbol before you trade. Brokers usually show the PM contract as SPXW.

Tax: the 60/40 rule (US only)

This part only matters if you pay US tax. SPX and XSP are what US tax law calls Section 1256 contracts. Gains on them are treated as 60% long-term and 40% short-term, however long you held the option. SPY options are taxed like stocks: a gain on anything held a year or less is short-term, at your income tax rate.

In the 24% bracket that's $540 less tax on a $10,000 gain. At the top it's $1,020. Two catches. Losses are split 60/40 too. And open SPX and XSP positions are taxed at their value on 31 December, as if you'd sold them.

Outside the US, none of this applies. Your country taxes the gains by its own rules, which may treat all three the same. Check with your local tax authority.

Which one is easiest to trade?

SPX trades in huge size. On 30 October 2026 Cboe recorded 7,457,428 SPX contracts traded. XSP traded 515,196, and its open interest was 941,940 contracts against SPX's 24,356,468.

SPY options trade on every US options exchange, and most brokers that offer options offer them. SPX and XSP trade only on Cboe, and some brokers don't offer index options at all. Check yours before you plan a strategy around them.

Outside the US

All three are US-listed contracts. Many brokers in the UK, Europe and Asia don't offer them to retail clients, and those that do may show different fees. Check what your broker offers, and read the risk documents it gives you.

The risks

• One SPX contract is $758,007 of exposure. Selling one without the cash or margin to back it can lose far more than the premium you took in.
• Spreads move. Our numbers are one day's closing quotes. In a fast market, every spread here can be several times wider.
• AM-settled SPX monthlies can settle well away from Thursday's close. The move was over 1% in 15 of 196 months.
• Short SPY options can be assigned on any day, and in-the-money SPY options turn into 100 shares at expiry.

So which one?

If you trade one or two contracts at a time, SPY is the usual choice. It has the tightest spreads, $0 commission at several brokers and the most choice of brokers. Just watch early assignment if you sell options, and close anything in the money before expiry.

If you trade bigger size, SPX is hard to beat. One contract replaces ten SPY, the spread on SPXW was the same or smaller and the fees are a couple of dollars. If you pay US tax, the 60/40 rule can save you real money. Use the SPXW series unless you know you want the AM settlement.

XSP sits in between. It's the only way to get cash settlement and, for US taxpayers, the 60/40 rule at SPY's size. You pay for it in wider spreads. Use limit orders, and expect to give up more getting in and out than you would on SPY.