Been noticing 0DTE options getting way more attention in trading circles lately, and honestly, there's a solid reason why. These things have completely changed the game for short-term traders, especially on the SPX.

So what exactly are we talking about? 0DTE stands for Zero Days To Expiration, basically options contracts that expire the same day you trade them. The whole appeal is pretty straightforward: if you nail the daily price movement, the returns can be insane. Since they expire by market close, you're not carrying overnight risk, which a lot of traders actually prefer.

The liquidity situation is wild too. The SPX became the main hub for this stuff after 2022 when the CBOE expanded daily 0DTE options across the entire trading week. Before that, you were limited to weekly expiration. Now? You've got them every single trading day. According to Goldman Sachs data, almost half of SPX volume is now 0DTE trades. That's a massive shift.

If you're looking at what 0DTE options list is actually available, technically all optionable stocks have them at least monthly, but the real liquidity is concentrated on the SPX. Most other stocks just don't have the volume you'd want, so you'd get slipped on entries and exits. Weekly option stocks get them once a week, monthly stocks once a month. The SPX dominance is purely because of liquidity and daily availability.

Why are traders actually doing this though? First, the profit window is tight but intense. You're betting on same-day price swings without holding overnight, so if you read the market right, gains come fast. Second, the bid-ask spreads are tight, meaning you can actually get decent fills. Third, the flexibility is real. You can react to news, adjust positions quickly, and take advantage of intraday volatility that most longer-term traders completely miss.

The strategies people use are pretty specific. The iron condor is popular because it's essentially a range bet. You sell both a put credit spread and call credit spread, banking on the underlying staying within a defined range until close. Max loss is capped at the width of your spreads minus the credit you collected. The iron butterfly works similarly but you're selling ATM options instead of OTM, which means bigger premiums upfront but same defined risk.

Now here's the real talk: selling 0DTE options is way more popular than buying them because any OTM option expires worthless, giving you a high win rate. But the market can move fast, and even if your trade technically wins, you might see brutal unrealized losses during the day. You need active management, quick reflexes, and honestly, a $25k account minimum if you're opening and closing positions (day trade rules apply).

The whole 0DTE options list phenomenon is basically theta decay on steroids. The time value evaporates by the hour, which can work massively in your favor if you're short premium, but it's also why this strategy demands constant attention. You can't just set and forget. Not everyone should be doing this, but if you understand the mechanics and manage risk tight, the opportunities are definitely there.