Latest / The Day Trading Podcast with Fexingo: Active Trading, Charts, and Short-Term Market Strategy / Day Traders Are Using SPY vs SPX Divergence Trades
Transcript
- Lucas: Alright, it's Friday, June 13th. The Russell 2000 just ripped 3.1 percent in five days. The Nasdaq? Basically flat, down a hair. And right now, there is a quiet divergence between the SPY ETF and the actual S&P 500 index that day traders can actually trade. Luna: Wait — SPY and the S&P 500 are supposed to track each other almost perfectly. What kind of divergence are we talking? Lucas: Normally, yes, they converge to within a few cents by the close. But during heavy sector rotation — money fleeing tech into small caps — the creation-redemption mechanism lags. SPY's market price can drift away from its net asset value. Right now, SPY is trading at a small premium to the S&P's fair value because there's more buying pressure on the ETF than on the underlying futures. Luna: So you're saying the SPY share price is decoupled from the basket it holds? That feels like an arbitrage that big firms would front-run. Lucas: They do, but the gap doesn't close instantly — it can persist for ten, twenty minutes, especially in the first hour. And that creates a repeatable setup. Here's the play: pull up a two-minute chart of SPY, overlay VWAP, and add a band at one standard deviation. When SPY's premium to the S&P futures is more than about three basis points — that's roughly fifteen cents on SPY — and the price touches the upper VWAP band, you take a short position betting on reversion back to fair value. Luna: Okay, so you're shorting the premium, not the index. What's your exit? Lucas: Target the convergence. I watch the difference between SPY and SPY's NAV — you can get that in real time from most brokerages or a second screen with the Bloomberg or TradingView composite. As soon as that gap shrinks below one basis point, I'm out half the position. The other half, I trail with a five-cent VWAP band. Luna: But isn't this mainly for traders with direct market access and colocation? How does a retail trader actually do this without getting eaten by latency? Lucas: Fair point. You don't need colocation. Use SPY options instead of the stock. If SPY is at $545 and the premium is wide, you buy an at the money put with about thirty minutes to expiry — the last Friday of the week, there are weekly expirations. The option's delta captures the reversion move, and the theta is manageable since you're holding for ten minutes max. The edge isn't huge per trade — maybe five to ten cents — but it repeats multiple times a day. Luna: So the signal is that the VIX is at 17.68, down six and a half percent over five days. Volatility is collapsing. That actually makes these small edge trades more viable because the spreads aren't blowing out. Lucas: Exactly. Low vol environment — the VIX under 18 — that's when market-making is tighter and the premium-discount gaps are more mean-reverting. High vol, the gap can just blow through because there's panic buying. So right now is actually ideal. Luna: One question — what if the premium keeps expanding? You could get stopped out repeatedly on a trend day. Lucas: That's why you need the VWAP band as your invalidation. If SPY stays above the upper band for more than three consecutive two-minute candles, the setup is dead. You step aside. The key is it's a mean-reversion trade, not a momentum trade. And you only take the first touch of the band after a new high in the premium. Luna: Alright, so first hour after the open, check the spy to nav spread, wait for a three-basis-point gap, short the upper VWAP band with an option. Got it. Lucas: Let's talk about why this is happening right now specifically. The Russell's 3.1 percent surge this week is the biggest five-day move since November. That's a massive rotation out of mega-cap tech into small caps. The Nasdaq is down because money is leaving Apple, Microsoft, and the rest. So the authorized participants who create and redeem SPY shares are struggling to keep pace with the order flow. Luna: So the APs are creating new SPY shares, but they have to buy the underlying stocks to back them. If they're buying Apple and Microsoft at the same time that everyone else is selling, they're getting filled slowly. That delay creates the premium. Lucas: Exactly. The creation process isn't instant. It takes minutes. In that window, aggressive buyers of SPY push the price above NAV. And the APs aren't going to short the ETF aggressively because they don't want to get squeezed. So the premium persists for a short window. Luna: What about the discount side? Do you ever see SPY trade at a discount? Lucas: Yes, it happens in the opposite scenario. If there's heavy selling in SPY but the underlying stocks are holding up, SPY can trade below NAV. That's a long setup — buy the discount, ride the reversion up. You'd use a call option in that case. But this week it's been mostly premiums because the rotation is so one-directional. Luna: Today is Friday, triple witching is next week. Does that affect the setup? Lucas: It probably amplifies the premiums because options market-makers are hedging their books. They buy or sell SPY to delta-hedge, which adds extra order flow on top of the natural rotation. So the gaps could be wider next week. But for today, the setup is clean. Luna: I want to talk about risk management. If you're wrong, how much do you lose? Lucas: On the option trade, your loss is capped at the premium paid — maybe fifty cents per contract. So it's a defined risk. If you're trading the stock directly, you'd set a stop at the VWAP middle band plus ten cents. But I prefer the option because it removes the gap risk. You know your max loss upfront. Luna: That makes sense. And you said you take half off at one basis point. What about the rest? Lucas: The second half, I set a trailing stop at the lower VWAP band. If the premium closes completely and the price keeps falling, it catches the follow-through. But typically, once the gap is closed, the price stalls. So the second half is just gravy. Luna: Alright. Let's talk about the bigger picture. Do you think this divergence will persist as long as the rotation into small caps continues? Lucas: It will persist as long as the rotation is sharp and concentrated. When the pace slows down, APs catch up, and the gap narrows. But as long as the Russell keeps outperforming the Nasdaq by a percent or more per day, the setup is live. Luna: So today, the Russell is up 3.1% over five days. The Nasdaq is down. That's a pretty big gap. I'd expect the setup to be active at the open. Lucas: Yeah, I'll be watching the first fifteen minutes especially. If the premium jumps to five or six basis points early, that's a high-probability mean reversion. Luna: One thing I've noticed — when the VIX is this low, the mean reversion is faster. So the hold time might be only three to five minutes. Lucas: Exactly. The shorter the hold, the less exposure to random noise. That's the beauty of this trade. You're not predicting direction; you're just pricing the mechanical convergence. Luna: We've talked a lot about SPY. Is this trade possible with other ETFs like QQQ or IWM? Lucas: Absolutely. The same logic applies to any major ETF with active APs. QQQ often shows a discount when tech is getting sold. IWM can show a premium when small caps are hot. But SPY is the most liquid, so the bid-ask spread is tightest. For a retail trader, that's important. Luna: Fair. So start with SPY. Master it there, then branch out. Lucas: Exactly. And if you're trading this, you need a good data feed. You can't rely on fifteen-minute delayed data. Most brokers now provide real-time NAV for SPY. Or you can use the SPY/SPX ratio on TradingView. Luna: Before we wrap, I want to bring up something that's been on my mind. We spend a lot of time on these podcasts talking about specific setups and tools. And I know that for a lot of listeners, this information genuinely changes how they approach the market. Lucas: I think the same thing. And honestly, that's the reason we keep doing this show ad-free. We want the content to be the value, not the commercials. But the reality is, producing this — the research, the recording, the hosting — it takes time and a bit of money. So if today's episode was worth a coffee to you, we have a link: buy me a coffee dot com slash fexingo. Luna: Yeah, it's the smallest way to say 'this was useful.' And it genuinely helps us keep the lights on without running ads. So if you've ever learned something from this show, consider it. Lucas: And we really mean it — even one coffee's worth makes a difference. Okay, back to the trade. So to recap today: watch the SPY premium over SPX in the first hour. When it hits three basis points and SPY touches the upper VWAP band, short using a weekly put option. Target one basis point on the first half, trail the second half with the VWAP band. Luna: And remember, the low VIX environment makes the mean reversion tighter. So if you see five basis points, that's even better. Lucas: Right. And if the premium never reaches three basis points, just wait. Sometimes the best trade is no trade at all. Good luck today, and we'll be back next week with more. Luna: Take care, everyone.