Thursday was the fourth straight down session for stocks, and the reason is not earnings or growth, it’s inflation and the cost of money. Markets are squarely focused on August CPI which is due out Friday, September 11, 2026, 8:30 a.m. ET
Friday’s CPI is the biggest macro event of the week, but the more interesting story is what happens after the number.
SPX still has meaningful options-related support around 7600 into Friday. After expiration, that support weakens considerably, leaving the market more vulnerable to a larger move heading into next Wednesday’s Fed meeting.
The takeaway: 7600 may hold differently tomorrow than it does next week.
The Setup
Markets have spent four straight sessions moving lower as inflation concerns have returned.
Oil is above $100. The 10-year Treasury yield has pushed through 4.9%. And the market now prices roughly a 70% chance that the Fed raises rates by 25 basis points next Wednesday—up from about 44% a week ago.
That makes Friday’s CPI unusually important.
Consensus expects headline CPI of +0.4% month-over-month and core CPI of +0.2%. The real question isn’t whether headline inflation looks hot—it probably will. It’s whether higher inflation remains concentrated in energy or is spreading into the broader economy.
That distinction could determine whether the Fed hikes next week.
That last point is worth sitting with. The market is not debating how fast the Fed cuts. It’s debating whether the Fed reverses course and tightens. That is a meaningfully different regime than most traders have been positioned for all year, and it’s why a single CPI print carries so much weight.
What Options Are Pricing
The volatility market is charging traders primarily for CPI, not next week’s Fed meeting.
Friday SPX options imply roughly a ±66-point move, with implied volatility around 18–19%. The term structure shows a pronounced CPI premium but only a modest increase around Wednesday’s FOMC meeting. The Nasdaq QQQ is pricing in an even more volatile move of $8.30 points which equates to a IV of 26.3%. The often higher beta Tech index may see more relative volatility with also the key Oracle (ORCL) earnings report due out tonight after the market close.
That creates an interesting disconnect, as viewed in the SpotGamma fixed strike vol matrix. We see a bid to implied volatility today in most expirations but mostly higher in tomorrow’s 9/11 expiration centering the focus on CPI.
The immediate event premium is concentrated in CPI, while the more fragile gamma setup actually develops after Friday.
And traders expecting the usual post-event volatility crush should be careful. CPI is Friday, but FOMC is only three trading sessions later. Options extending beyond Friday will continue to carry Fed event risk, limiting how much volatility can reasonably come out after CPI.
The Edge: Gamma Support Changes After Friday
SPX remains in positive gamma around 7600 through Friday, which should help dampen volatility and support the market on weakness.
That changes after expiration.
Once Friday’s positioning rolls off, gamma declines and turns negative below roughly 7560. A break of 7600 that attracts stabilizing flows Friday could therefore produce a much larger move next week.
On the upside, 7680 is the first resistance level, followed by 7750.
The SpotGamma equity hub also shows this picture of positive gamma decreasing after today’s expiration is removed. The smaller dashed line shows a decrease of that supportive gamma and turning negative below 7560 roughly. Conversely a rally higher would find first resistance at 7680 and then 7750 a larger level above. A more dovish outcome from this CPI report would likely translate into bigger gains in the interest rate sensitive small caps and IWM has come down recently into those fears. A snapback rally would be the surprise move.
Three CPI Scenarios
| Measure | Consensus (Aug) | Prior (Jul) |
|---|---|---|
| Headline CPI, m/m | +0.4% | +0.1% |
| Headline CPI, y/y | +3.4% | +3.4% |
| Core CPI, m/m | +0.2% | +0.2% |
| Core CPI, y/y | ~2.4–2.5% | +2.5% |
HOT — Core CPI 0.3% or higher
Rate-hike odds likely rise further, yields move higher and 7600 comes under pressure. High-duration technology and other rate-sensitive assets should be most vulnerable.
IN LINE — Core ~0.2%
The Fed debate remains unresolved. That favors choppy, level-to-level trading, with 7600 support and 7680 resistance defining the initial range.
COOL — Core ~0.1% or a meaningful headline miss
Hike expectations fall, yields ease and crowded shorts/rate-sensitive stocks can rebound. 7680 becomes the first upside test, followed by 7750.
Bottom Line
There are really two trades here.
Friday is about CPI. The options market has priced a substantial move, but positive gamma still provides some support around 7600.
Next week is about what happens after that support expires.
If SPX breaks 7600 after Friday and gamma turns negative below roughly 7560, the market becomes structurally more vulnerable just as traders head into a live Fed decision.
That makes 7600 more than a support level. It is the dividing line between the market structure we have today and the potentially more volatile one waiting next week.