Summary
SPX closed Monday at $7,515.34, down 0.79% on the day. VIX ticked up to 12.84. CPI releases Wednesday morning. The trade book is flat.
The post-CPI structure for consideration once the print clears: SPX bull put spread expiring Friday morning, August 21, 2026 (AM-settled — standard monthly SPX settles on the Friday opening print), short $7,320 / long $7,305. Estimated credit ~$306 per contract (computed at 12.8% IV; verify against the live chain after the print resolves). Max loss $1,194. Breakeven $7,316.94. Probability of profit ~80%.
All math uses spot $7,515.34 (Monday close) and VIX 12.84 as the IV proxy for the short-strike estimate. The actual credit at execution will depend on where SPX settles after the CPI print.
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Expected Move (1 Standard Deviation)
| Window | Points | Percent |
|---|---|---|
| 1 day | ±50 | ±0.67% |
| 1 week (5 sessions) | ±113 | ±1.50% |
| 32 calendar days (to Aug 21 expiry) | ±287 | ±3.82% |
The 30-day 1σ move is ±277 points. The proposed post-CPI short strike ($7,320) is 195 points below spot — about 0.70σ. That gives ~76% probability that SPX stays above the short strike over 30 sessions, before any skew or theta adjustment. The 80% POP estimate includes those adjustments.
Why Hold Flat Into the Print
Wednesday morning's CPI release is a known catalyst with binary outcome risk. Pre-event implied volatility is elevated relative to the recent range, but not high enough to justify selling premium that will decay into a vol crush if the print lands in line with consensus.
If the print is hot, an open short-premium position is hurt by the implied-vol spike even if the directional bias was right. If the print is cold, the position misses the relief rally because it is hedged against a different scenario.
The right move is to wait for the catalyst to resolve, then reassess.
Market Context
| Driver | Reading | Source |
|---|---|---|
| SPX spot | $7,515.34 | Monday close, yfinance |
| SPX 1d return | −0.79% | Computed |
| VIX | 12.84 | Monday close, +8% on the day |
| VIX3M | ~13.50 | Estimated from term structure |
| Term ratio | ~0.95 | Mild contango |
| Breadth (S&P 500 above 50d MA) | ~68% | Computed |
| Next catalyst | CPI Wednesday 8:30 AM ET | Fed calendar |
XLE was up 3.29% on Monday on Iran-related headlines. The defensive-sector bid pattern is consistent with the broader risk-off tone over the prior two weeks.
VIX was up 8% on the day despite SPX down less than 1%. That divergence — realized volatility modestly elevated while implied volatility ticks higher — is the early-warning signal that someone is buying tail protection into the CPI print.
Post-CPI Structure (For After the Print)
If CPI lands in line with consensus (3.0%–3.2% YoY), the market likely treats it as a continuation of the current disinflation path. Implied volatility will crush after the print, and short-premium structures become attractive again.
| Parameter | Value |
|---|---|
| Position | SPX (Cboe S&P 500 Index) Bull Put Spread |
| Short strike | $7,320 |
| Long strike | $7,305 |
| Width | 15 points |
| Days to expiry | 32 (expiry Aug 21, 2026) |
| Net credit | ~$3.06 per share = $306 per contract (BSM estimate) |
| Max profit | $306 per contract |
| Max loss | $1,194 per contract |
| Breakeven | $7,316.94 |
| POP (estimate) | ~80% |
Verify the exact credit with your broker after the print resolves. The estimate uses BSM with IV = 12.84%.
Alternative Post-CPI Scenarios
If CPI prints hot (>3.3% YoY). Risk assets sell off. VIX likely spikes 4–6 points. Wait for the vol spike to settle (typically 2–3 sessions), then reassess. If SPX 5-day return drops below −3%, a bear-call vertical on SPX becomes the candidate.
If CPI prints cold (<2.9% YoY). Rate-sensitive sectors (XLK, XLF) likely rally. VIX likely drops 2–4 points. SPX bull put spread at delta 0.15 (a slightly further OTM short strike) captures the lower-vol regime.
Trade Book
Open positions: None.
Plan for Wednesday afternoon: see the post-CPI forecast after the print resolves.
Disclosures
Not investment advice. Educational content only. All options involve substantial risk of loss. The expected-move and POP estimates above are model outputs and do not represent guaranteed outcomes. Verify all strikes, premium, and liquidity with your broker before placing any orders. The OptionsStrat build link is an affiliate link.
Past performance is not indicative of future results. Forecasts are based on market data available at publication and may be revised as new information becomes available.