The Memory Cycle Gauge reads 82.0 for October 2026, in the Shortage zone. It reached 98.4 in September, the highest reading of the year, and every month of 2026 has landed in Shortage. The October drop comes from one place. Micron’s share price fell back below its six-month trend while Korean chip exports, Micron’s margins and the supply language from the memory makers all stayed at or near the top of the scale. The physical market still says shortage. The stock market has started to ask how long it lasts.
Scoreboard
| Reading | Score | Zone | Change to now |
|---|---|---|---|
| October 2026 | 82.0 | Shortage | |
| September 2026 | 98.4 | Shortage | -16.4 |
| July 2026 | 94.7 | Shortage | -12.7 |
| January 2026 | 86.3 | Shortage | -4.3 |
Four inputs, one outlier
The score is the plain average of four inputs, each scaled from 0 to 100. Three of them measure the memory business directly. One measures what investors are willing to pay for it.
| Input | What it measures | Score | Latest reading |
|---|---|---|---|
| Korea chip exports | Year-on-year growth in South Korea’s semiconductor exports | 92.2 | +222.5% in October 1 to 20, $27.5B |
| Micron share trend | Micron’s weekly close against its 26-week average | 38.3 | $884.74, -5.8% against the $939.70 average |
| Micron gross margin | Latest reported non-GAAP gross margin | 97.3 | 87.0% in fiscal Q4 2026 |
| Supply language | Inventory and supply wording from Micron, SK hynix, Samsung and SanDisk | 100 | Sold out ahead, multi-year agreements |
Without the share price input the gauge would read 96.5, close to the ceiling. Korea shipped $27.5 billion of chips in the first 20 days of October, 222.5% more than a year earlier, and chips made up 44.7% of everything the country exported in that stretch. Micron’s fiscal fourth quarter brought $54.23 billion of revenue against $11.32 billion a year earlier, at an 87.0% gross margin, and the company guided to $61.5 billion and about 86.25% for the current quarter. SanDisk posted an 85.1% gross margin last week and guided to $12.2 to $12.6 billion of revenue for the next quarter, up from $11.0 billion. Those are not the numbers of an industry with spare product on the shelf.
What the memory makers are saying
The supply input sits at 100 because nobody in the business is describing inventory as a problem. SK hynix reported third-quarter revenue of 104.6 trillion won at an 80% operating margin and said long-term agreements already cover more than half of its capacity for 2027 and 2028. It expects demand to run ahead of supply through 2030, citing how hard leading-edge processes are and how long new fabs take to build. Samsung guided to a record third-quarter operating profit of about 107.4 trillion won on memory prices and HBM4. Micron has said it expects DRAM and NAND supply to tighten further through 2028.
Prices are still rising, just more slowly. A benchmark DDR5 16Gb chip went from $37.50 in May to $48 in September, up 28%. Industry forecasts for fourth-quarter contract prices call for DRAM up 10 to 15% and NAND up 15 to 20% from the third quarter, a slower pace than the jumps earlier in the year.
Korea, month by month
Korea shipped $340.4 billion of semiconductors from January through September, almost twice its total for all of 2025. Growth has sped up through the year, from 103% in January to 263% in September, and the partial October number kept that pace. Korea’s chip exports are mostly memory, so this is the cleanest monthly read on how much DRAM and NAND the world is buying and at what price.
Why the gauge fell in October
Micron closed the week of October 30 at $884.74. That is 17.7% below its close on October 2 and 22% below its June peak, and it left the stock 5.8% under its 26-week average for the first time in more than a year. The selloff hit the whole chip group. Broadcom’s chief executive said access to capital could become the main limit on AI spending, the IMF warned about weak returns on AI investment, a 3.7% US inflation print raised the odds of higher rates, and competition from Chinese memory makers weighed on the memory names in particular. None of that has changed what Micron ships or charges yet. It has changed how much investors will pay for the next two years of it. The same split shows up in the AI Market Analyzer reading, where price inputs collapsed while company guidance stayed confident, and the AI Capex Tracker for November 2026 shows the hyperscaler spending that drives memory demand still climbing.
History
This first edition covers the ten months of 2026 for which all four inputs could be checked. January was the low at 86.3, held down by Korean growth that had only just passed 100% and by Micron’s gross margin, which was still at 56.8% before the price increases fed through. The readings rose almost every month to 98.4 in September. October’s 82.0 is the lowest of the year and still well inside Shortage.
What to watch
- Korea’s full October figure and the November 1 to 10 and 1 to 20 numbers. A growth rate that slows below 100% would pull the Korea input under 75.
- Micron’s share price against roughly $940, its 26-week average. A close back above it would put that input over 50 and the gauge near 85.
- Micron’s fiscal first-quarter results in December. The gross margin guide of 86.25% is slightly below the 87.0% just reported. A second step down would be the first sign that pricing has peaked.
- Fourth-quarter contract price settlements for DRAM and NAND, and any sign that buyers push back.
- New capacity from Chinese memory makers and from the Korean and US fabs announced this year. Supply language changes before the numbers do.
Bottom line
Memory is still in shortage by every physical measure this gauge tracks: Korean chip exports are running at about three times last year’s pace, Micron and SanDisk are earning gross margins above 85%, and the producers have sold much of 2027 and 2028 already. The October drop to 82.0 came entirely from Micron’s share price breaking below its trend, which says investors have started to price the end of the cycle while the cycle itself shows no slack. For decision makers that means supply contracts and pricing should still be planned around scarcity into 2027, while equity exposure to memory now carries the risk that the stocks turn well before the fundamentals do. The signals to watch for a real turn are a slowdown in Korean export growth, a second quarter of lower margin guidance and softer language on long-term agreements.
Method. The Memory Cycle Gauge averages four equal-weight inputs, each scaled from 0 to 100. Korea chip exports score 50 plus 25 times the base-2 log of one plus the year-on-year growth rate, so flat growth scores 50, a doubling scores 75 and a quadrupling scores 100. The Micron share trend scores 50 plus two points for each percent the weekly close sits above its 26-week average. Micron gross margin scores 0 at minus 20% and 100 at 90%. Supply language is scored from 0 for inventory writedowns and production cuts to 100 for sold-out supply and multi-year agreements. Zones: 0 to 19 Glut, 20 to 39 Loosening, 40 to 59 Balanced, 60 to 79 Tightening, 80 to 100 Shortage. The October reading uses Korean export data for October 1 to 20 and Micron’s close on October 30. This is a market indicator, not investment advice.
