SPX closed Tuesday at $7,509.20, recovering the Monday dip to $7,443.28 with a +0.9% rebound that left the 20-day return modestly positive (+0.5%) and breadth healthy at 75% of large-caps above their 50-day moving average. The setup reads as a mid-vol continuation: VIX 17.36 in the middle of its 52-week range, term structure in mild contango (VIX/VIX3M ratio 0.844), and the next major catalyst — the FOMC meeting on July 28–29 — sits one week out, outside the five-day event window that would otherwise defer new positions. The trade is a credit spread that gets paid to wait while the bull thesis either re-asserts itself or fails.
The trade. Sell the SPX $7,235 put / buy the $7,225 put, expiring Friday morning, Aug 21, 2026 (AM-settled standard monthly SPX). Net credit $2.40 per share, or $240 per contract. Max profit $240 (full credit retained if SPX closes at or above $7,235 at settlement). Max loss $760 (if SPX closes at or below $7,225). Breakeven $7,232.60 — SPX can fall 277 points (3.7%) from the Tuesday close before the position starts losing money. Probability of profit ~80% based on the 0.20-delta short strike.
Why this structure. A bull put spread on SPX collects premium up front, caps the downside, and lets time decay do the work while the underlying trend holds. The 30-day expiry is far enough out that theta bleed is moderate rather than aggressive, and the short strike at $7,235 sits 3.7% below spot — comfortably inside the range the bull regime has defended for the past three weeks. SPX is cash-settled European-style; the short put carries no early-assignment risk on ex-dividend dates or in fast-market scenarios, which is the institutional default for index-level short-premium structures.
Expected Move (1 Standard Deviation)
Using VIX 17.36 as the IV estimate, the 1σ expected moves for SPX are:
| Window | Points | Percent |
|---|---|---|
| 1 day | ±68 | ±0.91% |
| 1 week (5 sessions) | ±153 | ±2.03% |
| 30 days (to Aug 21) | ±374 | ±4.98% |
| 60 days | ±539 | ±7.18% |
| 90 days | ±647 | ±8.62% |
| 1 year (252 sessions) | ±1,083 | ±14.42% |
The 30-day 1σ move is ±374 points. The short strike at $7,235 is 274 points below spot — roughly 0.73σ below current. For a short strike at 0.20 delta, an expected-move position at 0.73σ below current is the canonical "collect premium inside the trend" placement: the strike sits inside one standard deviation of the expected move, which means the chain's implied probability of finishing above the strike at expiry is ~80%. The breakeven at $7,232.60 sits 277 points below spot, near the lower edge of the 30-day 1σ range; a move that puts SPX through breakeven is a regime-confirming break, not a routine fluctuation.
Market context
| Driver | Reading | Source |
|---|---|---|
| SPX spot | $7,509.20 | Tuesday close (yfinance) |
| SPX 5d return | −0.47% | Computed from closes |
| SPX 20d return | +0.52% | Computed from closes |
| SPY vs MA50 | $748.28 vs $743.81 (above) | yfinance |
| SPY vs MA200 | $748.28 vs $694.27 (well above) | yfinance |
| VIX | 17.36 | yfinance |
| VIX3M | 20.54 | yfinance |
| Term ratio (VIX / VIX3M) | 0.844 | Mild contango |
| IV-rank proxy (SPY) | 42.5 | Computed vs 252d range |
| IV-rank proxy (QQQ) | 65.9 | Computed vs 252d range |
| Breadth — % above 50d MA | 75% | Computed vs SPY/QQQ/IWM/DIA |
| 2s10s Treasury spread | 0 bps | Treasury.gov — flat, not inverted |
| DXY (UUP proxy) | $28.48 | +0.3% 5d, +0.4% 20d |
| Copper/gold ratio | 0.00158 | Neutral |
| FOMC | Jul 28–29 (6 calendar days) | Federal Reserve calendar |
The bull regime is intact on every metric that matters: SPY sits above both the 50-day and 200-day moving averages, breadth is healthy at 75% above the 50-day, the 20-day return is positive, and the VIX term structure is in contango rather than backwardation. None of the macro caution triggers are present — the 2s10s spread is flat at 0 bps rather than inverted, the DXY is flat rather than rallying, and the copper/gold ratio is neutral rather than signaling slowdown. The single notable cross-current is QQQ's IV-rank at 65.9, which is moderately elevated versus SPY's 42.5 — that gap reflects the tech-led rotation pressure visible in XLK's −5.9% 20-day return, but it does not yet threaten the broader bull thesis.
| Sector | 5d Return | 20d Return | Read |
|---|---|---|---|
| XLE (Energy) | +2.72% | +8.21% | Energy bid extends — possible Iran/oil premium |
| XLV (Health Care) | +1.24% | +6.79% | Defensive leadership intact |
| XLP (Consumer Staples) | +0.77% | +2.29% | Defensive bid |
| XLF (Financials) | −0.12% | +4.49% | Mild steepener trade |
| XLU (Utilities) | −1.69% | +0.45% | Slight defensive wobble |
| IWM | +0.69% | −0.55% | Small-caps flat — neutral |
| XLY (Consumer Discretionary) | −0.89% | −0.06% | Cyclical drag |
| XLI (Industrials) | −0.99% | −1.73% | Slowdown concern |
| XLB (Materials) | −1.07% | −2.94% | Industrial slowdown |
| XLK (Technology) | −1.55% | −5.92% | Rate-sensitivity pain — worst sector over 20d |
Tech (XLK) is the dominant signal: −5.9% over 20 sessions against an essentially flat SPY tape is the classic late-cycle rotation signature. Defensive leadership (XLE, XLV, XLP) extends while cyclicals (XLY, XLB, XLI) lag. QQQ is down 3.9% over 20 sessions — a sharper drawdown than SPY, consistent with rate-sensitivity pressure in long-duration tech names. The pattern is consistent with a bull regime in distribution rather than acceleration: trend intact, but leadership narrowing. That context supports a credit spread over a long-vol expression — the structure collects premium while the tape works through the leadership question.
Structure details
| P&L field | Value | Math |
|---|---|---|
| Short $7,235 put (mid) | $50.85 | Live yfinance Aug 21 chain at 10:48 ET — bid $50.60, ask $51.10, vol 16, IV 17.5% |
| Long $7,225 put (mid) | $48.45 | Live yfinance Aug 21 chain at 10:48 ET — bid $48.10, ask $48.80, vol 240, IV 17.5% |
| Net credit | $2.40 per share | $50.85 − $48.45 = $2.40 |
| Per-contract credit (×100) | $240.00 | $2.40 × 100 |
| Max profit | $240.00 | Full credit — collected if SPX closes ≥ $7,235 at expiry |
| Max loss | $760.00 | ($10 width − $2.40 credit) × 100 = $7.60 × 100 |
| Breakeven | $7,232.60 | $7,235 short strike − $2.40 credit per share |
| POP estimate | ~80% | 1 − 0.20 delta for the short strike |
| Required move against | 3.69% | From $7,509 to $7,233 — within 30-day 0.77σ range |
| Risk-reward | 1 : 0.32 | $240 max profit vs $760 max loss |
| Reward-to-risk | 0.32:1 | Smaller reward, defined risk |
| Greek (per leg, BS at spot) | Short $7,235 put | Long $7,225 put | Net |
|---|---|---|---|
| Delta | −0.20 | −0.16 | −0.04 net short delta |
| Theta (per day) | +0.06 | +0.04 | +0.10 per day (net positive — selling time) |
| Vega (per 1 vol pt) | −0.22 | −0.18 | −0.04 per vol point (mild net short vega) |
The trade is net short delta at −0.04 (mildly bullish positioning — collects premium if SPX stays flat or rises). It is net long theta at +$10 per day (time decay works in the position's favor across both legs). Vega is mildly negative at −0.04 per vol point — a 1-point VIX drop from 17.36 to 16.36 lifts the mark by roughly $4; a 1-point VIX rise costs roughly $4. The vega exposure is the secondary risk; delta and theta are the structural edge.
Alternatives considered
| Rejected | Reason |
|---|---|
| Iron condor on SPX | No range confirmation — breadth is healthy, not narrowing |
| Bear call vertical on SPX | No bear case — SPY above both MAs, breadth intact |
| Bull call vertical on SPX | Mid-vol favors credit over debit |
| Put spread insurance (tail hedge) | VIX 17.36 is mid-range, not complacency; no cheap tail to buy |
| SPY instead of SPX | SPY is American-style; short put carries early-assignment risk |
| XSP (1/10 of SPX) | XSP chain not returned on live pull; SPX stays executable |
| Sep 18 monthly expiry | One-month window is the target; longer adds gamma risk |
| Tighter 5-wide spread | $370 max loss, $120 max profit — worse reward-to-risk |
Iron condor on SPX. No range confirmation — breadth is healthy at 75%, not narrowing like Tuesday's setup. Condors perform best when the tape is range-bound for the full duration; a bull regime with mid-vol favors a directional credit spread over a market-neutral structure.
Bear call vertical on SPX. No bear case — SPY is above both MAs, 20d return is positive, breadth is intact. Selling upside premium requires a resistance level or a regime break that isn't present.
Bull call vertical on SPX. Mid-vol favors credit over debit. The same bullish thesis expressed as a long call vertical would cost $5–6 per share (~$500–600 per contract) for similar upside exposure; the credit spread collects premium up front and pays out if the trend holds or reverses modestly.
Put spread insurance (tail hedge). Complacency regime signature — VIX <14 — is not present. VIX at 17.36 is mid-range; buying tail protection is appropriate when premium is cheap, not when it is mid-range.
SPY instead of SPX. SPY is American-style; the short put carries early-assignment risk on ex-dividend dates and in fast markets. SPX is cash-settled European-style — the institutional default for index-level short-premium structures.
XSP (1/10 of SPX). XSP options were not returned on the yfinance live chain pull in this session (no spot quote, no chain data). SPX stays the executable choice with verified live strikes.
Sep 18 monthly expiry. The structure target is a one-month window; longer duration adds theta bleed and gamma risk for the same short-strike placement. Sep 18 also crosses the Sep FOMC meeting — a known catalyst inside the trade window.
Tighter 5-wide spread. Width=5 would reduce max loss further, but the bid-ask on the long 7230 put (vol 11) is wider, and the resulting structure ($370 max loss, $120 max profit) has worse reward-to-risk than the 10-wide version.
Position sizing
- Trade size: 1 contract of the bull put spread. Max risk $760 per contract, under the $1,000 default and the $5,000 cap.
- Why 1 contract: at 0.20 delta on the short strike, 1 contract of a 10-wide SPX bull put spread sizes naturally near the $1,000 default target. Higher-conviction accounts may run 2 contracts ($1,520 max risk); that remains under the $5,000 cap. Three contracts ($2,280 max risk) approaches the cap and should only be considered for accounts with explicit premium-selling mandates.
- Sizing math: $2.40 credit per share × 100 SPX multiplier = $240 per contract max profit; ($10 width − $2.40 credit) × 100 = $760 per contract max loss. Account risk budget: keep this trade at or below ~0.8% of net liquidating value at the max-loss level.
- Liquidity check: short 7235 put has 16 contracts of intraday volume on the Aug 21 monthly chain; long 7225 put has 240. Both bid-ask spreads are tight (0.5–0.7 points, ~1% of mid) — SPX sits in Tier 1 (millions of contracts/day, tightest spreads) on the option-volume ranking. No liquidity concerns.
Risks to the trade
- Sharp drawdown into FOMC. The Federal Reserve's July 28–29 meeting sits 6 calendar days from today and falls inside the trade window (the trade expires Aug 21). A hawkish FOMC surprise — higher rates, tighter forward guidance, or a delayed-cut signal — could pressure equities broadly and put the short strike at risk. Mitigation: the trade is sized at 1 contract with $760 max loss; the structure gives back the full $760 only on a sustained move through $7,225, which would require a multi-day drawdown well beyond the routine pre-FOMC volatility. A standard pre-FOMC wobble of −1% to −2% lands SPX at $7,358 to $7,284, still well above the breakeven at $7,232.60.
- Vol expansion. The position is mildly short vega. A VIX spike from 17.36 to 25 — typical post-FOMC path if the meeting lands hot — would mark the position down by roughly $30 per contract on the vol move alone, before any directional impact. Mitigation: the theta capture of ~$10/day offsets the daily bleed from a vol spike; the structural edge is theta, not vega, so this is the trade's secondary risk rather than primary.
- Regime break. A confirmed bear regime — SPY closing below MA200 at $694.27 with breadth flipping below 40% — would invalidate the bull thesis. The continuation trade would not have been selected in a bear regime, so this risk is a regime change rather than a routine fluctuation. Mitigation: the trade has a 6-day window before FOMC and a defined exit plan (see Position Management); if breadth breaks before expiry, close at the market rather than hold into a regime-confirming move.
- Chop with elevated vol. The trade's worst case is SPX grinding sideways in a tight range with VIX elevated (15–20). Theta continues to work, but the credit capture is slowed by negative gamma on the short strike. Mitigation: the 30-day window is short enough that even modest time decay produces $240 capture; a chop regime is not the loss case, only a slower-payoff case.
- AM-settlement timing risk. Standard monthly SPX settles on the Friday morning opening print. The last trade day for the Aug 21 expiry is Thursday, August 20. After Thursday's close, the position cannot be managed; overnight news from Thursday 4:00 PM ET through Friday 9:30 AM ET lands directly in the settlement print. Mitigation: for a credit spread with a $7,232.60 breakeven and SPX at $7,509, the overnight gap risk cuts both ways — a gap down that touches the short strike would assign the position but not break the spread, while a gap up is a tailwind. Position management should target closure by Wednesday August 19 (two days before last trade) for accounts uncomfortable with the overnight window.
Position management
| Trigger | Action | Rationale |
|---|---|---|
| Profit-take at 50% | Close at $1.20 debit (50% captured) | A 50% gain on a short-premium structure is a strong realization. Remaining credit still has optionality, but the bulk of the edge has been captured. |
| Stop-loss at 2× credit | Close if debit rises to $4.80/share ($480 to close) | A move from $2.40 credit to $4.80 debit is a regime-confirming shift. Holding through it exposes the position to full max loss without a corresponding thesis update. |
| Delta stop | Close if short put delta rises above 0.35 | Delta expansion is the early signal of a regime break before the credit-to-debit move is material. A 0.35 delta on the short strike is consistent with the strike moving toward the spot price. |
| Time stop at 7 days remaining | Close on Aug 14 unless stops hit | Gamma accelerates into the final two weeks. Closing one week before expiry removes the gamma tail. |
| FOMC adjustment (Jul 28–29) | Hold through FOMC unless delta stop triggers | The structure's short strike at $7,235 is well below spot; a standard pre-FOMC wobble does not threaten the position. The breakeven buffer still has $47 of room. |
| Roll down-and-out | Roll down 5 and out to Sep 18 if short strike tested | Rolling preserves the credit capture if SPX stabilizes near the strike; the new short strike collects fresh premium and adds runway. |
What to watch today
- Breadth reading. Today reads 75% above 50d MA. A close below 60% would be the first warning that the bull regime is narrowing; below 40% is the regime-break threshold and would prompt closing the position ahead of the FOMC window.
- VIX term structure. Currently 0.844 (mild contango). A flip into backwardation (ratio >1.05) signals stress and would mark the position down on the vega tail. A move into deeper contango (ratio <0.80) signals complacency and would be a tailwind for the short-premium capture.
- XLK relative to MA200. Tech is the leading indicator. QQQ at $708.97 vs MA200 at $640.55 is still comfortable; a break of QQQ below $680 (still 6.1% above MA200) would signal a regime shift toward confirmed bear and would invalidate the bull-put-spread thesis.
- FOMC setup news flow. The Jul 28–29 meeting enters the five-day event window on Monday July 27. From that date forward, the structure transitions from a continuation trade into an event trade; the position management plan above addresses the FOMC path explicitly.
- 2s10s Treasury spread. Currently flat at 0 bps. A move into inversion (negative) would layer macro caution on top of the leadership rotation; a steepener back to +25 bps would re-affirm the bull case.
Disclosures
Not investment advice. Educational content only. Options trading involves substantial risk of loss, including the full amount of premium paid for long-option structures or the full width of spreads for short-option structures. Past performance is not indicative of future results.
Live chain source. Strikes and mid premiums were pulled from the live yfinance SPX option chain at 10:48 ET on July 22, 2026. The Aug 21 2026 monthly chain returned short put 7235 mid $50.85 (bid $50.60, ask $51.10, IV 17.5%, volume 16) and long put 7225 mid $48.45 (bid $48.10, ask $48.80, IV 17.5%, volume 240). Total live spread credit was $2.40 per share or $240 per contract. BSM flat-IV estimate using VIX 17.36% produced a credit of $2.08 per share — within 13% of the live mid; live values are used throughout this article. Strike selection was driven by the live chain, not by OptionStrat; build the structure in your broker and confirm premiums before placing any orders.
Build your own structure. OptionsStrat affiliate link lets you model the bull put spread and see the full risk curve, including vega exposure and time-decay curves that don't appear in a simple P&L table. Verify all strikes and premium with your broker before placing any orders.
Settlement note. Standard monthly SPX options are AM-settled — they expire on the Friday opening print, not the close. The last trade day for the Aug 21 expiry is Thursday, August 20, 2026. After Thursday's close, the position cannot be managed; overnight Thursday news lands directly in the settlement print.