Planning to trade SPXW options? Here are my 2 cents that might change your mind.

01Commissions are per lot, not per order

This is the first thing that breaks a model you carry over from India.

Here, brokerage is flat per order. Twenty lots or two hundred, same twenty rupees. Scaling costs you nothing, and a lot of Indian strategies quietly depend on that whether or not the person running them knows it.

In the US you pay per contract. Every leg, both directions. A four leg structure in size stops being a rounding error and turns into a real line in your P&L, one you have to plan around before the first trade goes on.

If your edge per trade was small and you made it up on volume, that doesn’t cross over.

02Extremely thin liquidity

SPX volume looks enormous, and in notional terms it is. But each contract carries a lot of value, so a big dollar figure doesn’t mean someone is parked at your strike waiting to take the other side.

Depth at the touch is thin. Thinner the further you go from the money.

You find this out the first time you need to be out quickly rather than eventually.

03Erratic gamma moves and huge bid ask spread on high speed moves

On a fast move the bid ask doesn’t widen politely. It gaps.

And the further out in time you go, the worse your starting point. By the time you’re looking at later expiries and LEAPS, the spreads are wide enough that you should treat those as a different instrument with a different cost model, not the same trade further out.

I got stuck once. Two, maybe three hours in a contract with no exit at any price I was willing to pay. Not a crash. Not some once in a decade tape. Just a fast move on an ordinary day.

If your risk management assumes you can always get out, price that assumption, because here it isn’t free.

04Extremely low retail participation in SPX options

People underestimate this one badly.

In Indian index options you’re trading into a very large retail pool. Some of the flow you’re taking the other side of is worse informed than you are, and that’s a real part of why the edges here look the way they do.

SPX isn’t that. The market makers are institutions with close to a monopoly on the liquidity. American retail is mostly not in SPX at all. They’re trading stocks intraday, or MNQ and MES.

So ask who is filling you, and why they’re happy to. In India the honest answer is sometimes someone worse than you. In SPX, almost never.

05Can’t trade from India as an Indian resident

As an Indian resident you can’t legally trade US options. No amount of strategy work gets around that.

So if you’re serious, you have to actually be somewhere else, and Dubai is the usual answer. Residency, banking, tax, and a fixed annual cost before you’ve placed a single trade. It is not a weekend of paperwork.

Talk to someone who does this properly rather than to a trading group. Getting it wrong is expensive in a way that has nothing to do with markets.

06So should you move?

If it’s because SPX looks easier, no. It’s a harder market, the counterparties are better, and the cost structure punishes the exact kind of scaling most Indian retail strategies lean on.

If it’s because you want a second book that isn’t correlated to your Indian one, and you have the capital and the setup to run it properly, that’s a different question. Then maybe.

What I’d push back on is treating CAS as the reason to leave. It’s a rule about how the closing price gets found, and rules get revised. I’d rather spend that energy on the people who can actually change it.