GIS Earnings Preview: Options Price a ±4.0% Move
· The NYC Memo · GIS reports 2026-09-15
General Mills, Inc. reports September 15, 2026. The September 18, 2026 straddle implies ±4.03% against a 3.92% average reaction, with dealers short gamma and max pain at $37.5.
Live updates
Sep 15 — Ahead of GIS earnings on September 15, 2026, spot rose from $35.85 to $36.47 as at-the-money implied volatility increased from 35.3% to 48.1%, implying a 4.03% post-earnings move.
Sep 14 — ATM implied volatility for GIS increased from 30.1% to 35.3% ahead of earnings on September 15, 2026, implying an expected move of 4.21% through the September 18, 2026 expiration.
General Mills, Inc. (GIS) reports Q1 2027 results on September 15, 2026, with spot at $36.47, down -6.3% over the past month. For the September 18, 2026 expiry, the $1.47 straddle prices a 4.03% implied move within an implied range of $35.00 to $37.94. This asks for more movement than the average realised reaction of 3.92% across 7 prints counted, which produced 3 higher and 4 lower closes.
Dealers hold a short gamma position, alongside put/call open interest of 0.71 and max pain at $37.5. A short gamma posture obligates dealers to sell into declines and buy into rallies, compounding underlying price momentum and widening intraday swings on the tape.
What the market will be watching
Traders heading into the earnings release will focus on organic volume trends and consumer elasticity across packaged foods. The market will measure category market share in ready-to-eat cereal and retail takeaway in pet food to assess baseline demand. Gross margin health remains critical as supply chain productivity offsets commodity inflation and renewed trade promotions. Desks will track adjustments to full-year net sales and operating profit targets, particularly commentary on distributor destocking and consumer trade-down risk, to price forward volatility.
What the options market is pricing
| Measure | Level |
|---|---|
| September 15, 2026 | |
| Expiry used | September 18, 2026 (3 days out) |
| Spot | $36.47 |
| ATM straddle | $1.47 |
| Implied move | ±4.03% ($35.00 to $37.94) |
| ATM implied vol | 48.1% |
| Put/call open interest | 0.71 |
| Max pain | $37.5 |
| Net dealer gamma | -$1mn per 1% move, SHORT GAMMA |
| Heaviest call strike above spot | $40 (10,272 contracts) |
| Heaviest put strike below spot | $35 (12,762 contracts) |
| Street EPS estimate | $0.73 |
| Street revenue estimate | $4.38bn |
Dealers sit short gamma into the print, so their hedging chases direction. A surprise in either tail gets amplified rather than absorbed.
How the stock has reacted before
| Report | Next-day move |
|---|---|
| Q1 2026, Jul 1 | +7.96% |
| Q4 2025, Mar 18 | -3.20% |
| Q3 2025, Dec 17 | +3.59% |
| Q2 2025, Jun 25 | -5.69% |
| Q1 2025, Mar 19 | -3.52% |
| Q4 2024, Dec 18 | -2.91% |
| Q3 2024, Sep 18 | +0.54% |
Across the last 7 prints the average absolute reaction is 3.92%, with 3 higher and 4 lower. The best was +7.96% and the worst -5.69%. Options are asking ±4.03%, which is 0.11 points richer than the realised average, the premium seller's case.
Where the stock is trading
| Measure | Level |
|---|---|
| Spot | $36.47 |
| 52-week range | $31.75 to $51.33 |
| Position in that range | 24% |
| From the 52-week high | -28.9% |
| From the 52-week low | +14.9% |
| Past week | -4.8% |
| Past month | -6.3% |
| Past three months | +5.7% |
| 50-day average | $37.81 |
| 200-day average | $39.63 |
RSI reads 67, state neutral, bearish divergence on the daily, regime uptrend.
How the options market is pricing it
The September 18, 2026 straddle marks $35.00 to $37.94 as the range the options market is paying for into the print, with ATM implied vol at 48% set to drain the morning after. A reaction inside that band hands the edge to premium sellers; a break outside it rewards premium buyers. Historically GIS has moved 3.92% on earnings against the ±4.03% now implied, so the market is pricing this print richer than the recent average. Which side of that trade is right depends on the number, the guidance and where positioning unwinds.
Read the mechanics behind the crush in our earnings volatility guide, and pull the live memo for GIS before the print.
Data as of September 15, 2026 from the live option chain, exchange price history and SEC-dated earnings reactions. This is research, not investment advice.
Related: GIS options memo