$SPX vs $SPY Options: Why I Still Trade $SPY (And When $SPX Wins)

Every few months, somebody in the Discord asks me the same question. Why do you trade $SPY when $SPX exists?

It is a fair question. $SPX options are cash-settled, carry no assignment risk, and get better tax treatment. On paper, they look like the superior product. So in this $SPX vs $SPY options breakdown, I am going to give you my honest answer: what $SPX does better, what $SPY does better, and why I still trade $SPY every morning.

No fluff. No sponsored opinion. Just how I see it after six years of trading 0DTEs for a living.

What $SPX options actually are

$SPX options are index options. They track the S&P 500 index itself, not an ETF that tracks the index.

Three things make them different from $SPY options, and you need to understand all three before you pick a side.

First, they are cash-settled. When an $SPX option expires in the money, no shares change hands. The Options Clearing Corporation just credits or debits the cash difference. You never wake up owning anything.

Second, they are European style. That means they can only be exercised at expiration. Nobody can exercise early and surprise you on a random Tuesday.

Third, they are big. One $SPX contract controls roughly ten times the notional value of one $SPY contract. A single contract is a serious position, and the premium reflects that.

$SPX has 0DTE expirations just like $SPY does, so everything I teach about timing and structure still applies. The product is just built differently.

Where $SPX wins, and it wins big

Let me be straight with you. $SPX has real advantages, and if you trade serious size, they are not small.

Cash settlement kills assignment risk. This is the big one. With $SPY, an option that expires in the money turns into 100 shares. With $SPX, it turns into cash. There is no pin risk, no waking up long or short stock over the weekend, no scrambling to flatten a position your broker auto-exercised. The trade just settles and you move on. You can read more about how the mechanics work in my full post on options assignment risk on 0DTE, because this difference matters most on expiry day.

European style means no early assignment. American-style $SPY options can be exercised at any time before expiration. It is rare, but it happens, usually around dividends or on deep in-the-money shorts. $SPX options cannot be exercised early at all. That entire category of risk simply does not exist.

The 60/40 tax treatment. $SPX options fall under Section 1256 of the tax code. That means 60% of your gains are taxed at the long-term capital gains rate and 40% at the short-term rate, regardless of how long you held the position. For an active 0DTE trader who holds positions for minutes, that is a meaningful edge over $SPY gains, which are generally treated as short-term. I am not your accountant, so talk to one, but the math is the math. Investopedia has a clean breakdown of Section 1256 contracts if you want the details.

Cleaner handling at size. Because each contract controls so much notional, traders moving real size need fewer contracts to express a view. Fewer contracts, fewer fills to manage, less legging in and out.

Want to watch me trade this live? I call these setups out in real time every morning inside the free Bulls Corner Discord. Get in free here, just drop your email and you're inside.

Where $SPY wins

Now the other side. $SPY has advantages that matter more than most $SPX fans admit, especially if you are not trading institutional size.

Accessible contract size. One $SPY contract is roughly one-tenth the notional of one $SPX contract. That means you can size positions precisely, scale in and out cleanly, and take the same setup ten times instead of betting the farm on one contract. For anyone still building an account, this is not a minor detail. It is the whole game.

The most liquid options chain on earth. $SPY 0DTEs trade with penny-wide spreads and instant fills all day. You click, you are in. You click, you are out. That liquidity is exactly what an intraday scalper needs, because on 0DTE every second of slippage is money.

American style flexibility. Yes, American style carries early assignment risk. But it also means you can exercise whenever you want. For a buyer who wants the flexibility to take the shares, or a trader running multi-leg positions, that flexibility has value.

Simplicity. $SPY is one share-class, one chain, one thing to learn. $SPX has standard monthly contracts, weeklies, quarterlies, and different settlement procedures depending on the series. None of that is hard, but it is friction, and friction costs focus.

If you want the full breakdown of how I actually trade $SPY 0DTEs, my $SPY 0DTE options trading guide covers the whole framework.

Why I still trade $SPY

Honest answer: simplicity and cost of entry.

My entire model is built around $SPY and $QQQ 0DTEs. Liquidity Sweeps, Directional Shifts, Structure Break Points, High-Value Zone entries. I have traded those two tickers for years. I know how they move at 10 AM. I know how they behave into the close. That familiarity is an edge, and I do not give up edges for tax treatment.

The contract size matters too. I take the same size on every trade. That discipline is easy to maintain when one contract is a manageable unit. On $SPX, one contract is a monster, and managing consistent size gets harder, not easier.

Could I switch? Sure. Do I plan to? No. $SPY does everything I need, the fills are perfect, and I would rather master one product deeply than split my attention. If you want to understand the $SPY versus $QQQ decision specifically, I wrote about that too: $QQQ vs $SPY for 0DTE.

Here is my real position: $SPX wins at real size. If you are trading enough contracts that the 60/40 tax treatment moves your annual number by five figures, and assignment risk keeps you up at night, $SPX is probably the better product for you. Below that level, $SPY gives you everything you need with none of the friction.

How to decide which one is for you

Forget the internet debates. Run through this checklist and the answer picks itself.

Learning the game or building an account. Trade $SPY. Smaller contracts, simpler product, deepest liquidity. Master the model first.

Assignment risk keeps you up at night. Look at $SPX. Cash settlement removes the entire problem. Nothing to exercise, nothing to wake up holding.

Trading serious size and paying serious taxes. $SPX. The 60/40 treatment and the per-contract notional start to matter a lot at scale. Talk to your accountant and run the numbers.

You trade my PSS Model intraday. $SPY, because that is what the model was built on and what I call out every morning. The Greeks behave the same on both, by the way. If you want to understand how they work on 0DTE, read my 0DTE options Greeks post.

You want to trade both. Fine. Plenty of traders run $SPY for scalps and $SPX for swing or hedge positions. Just know both products cold before you mix them.

One more thing. Whichever you choose, learn the settlement rules of that product before your first trade. Most $SPX horror stories are not about the market. They are about traders who did not know what cash settlement actually meant until expiry day. The CBOE product page for $SPX options is the authoritative source. Read it.

If you want to see this live instead of reading about it, I trade $SPY and $QQQ 0DTEs every morning and call every step out loud. The free Discord is where it happens, join free.

And if you want the whole thing, every setup, every alert, plus my full course: the 7-day free trial gets you inside Premium free for a week.

See you in the morning session.

FAQ

Can you trade $SPX 0DTE options?

Yes. $SPX has daily expirations just like $SPY, so you can trade 0DTE $SPX options every trading day. The pricing and Greeks behave the same way. The differences are structural: cash settlement, European style exercise, and much larger notional per contract.

Is one $SPX contract really ten times the size of one $SPY contract?

Roughly, yes. $SPX tracks the S&P 500 index at full value while $SPY tracks it at roughly one-tenth. So one $SPX option controls about ten times the notional value of one $SPY option at a comparable strike. That is why the premiums look so much bigger.

What is the 60/40 tax treatment on $SPX options?

$SPX options are Section 1256 contracts. Under that rule, 60% of your gains or losses are treated as long-term and 40% as short-term, no matter how briefly you held the position. For active short-term traders, that blended rate is usually better than the all-short-term treatment $SPY gains get. Confirm the details with your own accountant.

When should a $SPY trader switch to $SPX?

When your size makes the tax treatment meaningful and assignment risk becomes a real operational headache. For most developing traders, $SPY is the better learning vehicle: smaller contracts, simpler fills, and the deepest liquidity in the options market. Switch when the math says so, not when the internet says so.

Risk note: everything on this blog is educational content from my own trading experience, not financial advice. Trading options involves substantial risk of loss.