KLA surges 7.32% amid storage sector rally, market eyes upcoming CPI data

The U.S. stock market was closed on Monday, September 7, for Labor Day, with no trading or economic data released throughout the day; therefore, this article presents a weekly outlook rather than an evening market update. The previous trading day was Friday, September 4, during which only the Russell 2000 rose 0.25%, while the Dow Jones Industrial Average fell 0.51%, the S&P 500 dropped 0.38%, and the Nasdaq Composite declined 0.29%. The stock of the day was KLA Corporation (KLAC), which surged 7.32% to close at $185.60—despite no company announcements from KLAC on that day. Today’s U.S. Stock Classroom catches up on the weekend lesson: on the same day, within the same apparel sector, Lululemon (LULU) fell 17.4% while Abercrombie & Fitch (ANF) rose 4.3%, and the divergence was not due to differences in their most recent quarterly earnings. This week’s macroeconomic focus is the August CPI release on Friday at 12:30 UTC. All data in this article is based on U.S. market closing prices as of September 4, 2026.

The unit is %. Daily changes are relative to the previous trading day's closing value. Since no index levels were provided for the day, this article only reports percentage changes, not point values. On September 4, among the four indices, only the Russell 2000 rose 0.25%, while the Dow Jones Industrial Average fell the most at 0.51%, the S&P 500 fell 0.38%, and the Nasdaq Composite fell the least at 0.29%.

The reason for the decline was reflected in the employment data released the same day: non-farm payrolls increased by 162,000 in August, far exceeding the market expectation of 55,000, while the unemployment rate remained unchanged at 4.1%. Strong employment is typically good news, but at this stage, it signals that money will become more expensive—the yield on the two-year U.S. Treasury rose to 4.374%, a one-year high, and market pricing for a September rate hike briefly climbed to around 50%. As discount rates rise, assets with cash flows further in the future are hit first, which is why the three major indices weighted heavily by large-cap tech stocks closed lower, while smaller-cap stocks, with inherently lower valuations and shorter durations, ended up in positive territory.

One thing to remember first: Today, the U.S. stock market didn’t decline because of falling profits—it declined because of a higher discount rate. A company’s earnings didn’t worsen in a single day; what changed was the rate at which the market discounts its future cash flows. Only by understanding this can you grasp why the stock that rose the most today follows a completely different logic than the broader market.

The score ranges from 0 to 100, compared against industry peers and its own one-year historical performance, with the benchmark set at the close on September 4. On that day, KLA Corporation (KLAC) closed at $185.60, up 7.32%, adding $16.5 billion in market value to reach $242.4 billion; trading volume matched the 30-day average, with no significant increase. Among the five dimensions, it achieved a perfect score of 100 for peer ranking, 93 for industry valuation temperature, 77 for relative strength against peers, 62 for volatility control, and only 44 for trend position—the weakest of the five.

What really matters is this gap. A peer ranking of 100 means that, on that day, no other stock in its group outperformed it; a trend position of 44 means the price is still sitting in the lower half of its one-year range—the one-year range is $90.67 to $307.37, and $185.60 falls at the 44% level. Gaining the most and being at the highest level are not measuring the same thing: seeing only the +7.32% gain might make you think this is a strong stock; but when you add the trend position of 44, you realize it’s a stock rebounding from a low point.

Also read the volume column. Today’s trading volume matches the 30-day average, indicating that the price movement isn’t driven by new capital inflows, but rather by the same funds shifting positions—this is a repricing, not a breakout on increased volume.

Same supply chain: money flows upstream, while the downstream gets sold.

The unit is %, representing the single-day price change on September 4, with the previous trading day's closing price as the benchmark. The six companies are distributed across different segments of the semiconductor supply chain; their performance on that day was as follows: KLA (KLAC) rose 7.32%, Micron (MU) rose 6.10%, Lam Research (LRCX) rose 5.12%, NVIDIA (NVDA) rose 0.84%, Hewlett Packard Enterprise (HPE) fell 4.48%, and Synopsys (SNPS) fell 5.40%.

The most important thing today isn’t who rose the most, but where the line between gains and losses is drawn. All three gainers are upstream equipment and storage companies, while the two losers are one downstream hardware company and one design software company. The fact that opposite movements occur on the same chain indicates this isn’t a broad buying surge, but rather capital shifting within the chain—funds are being pulled from downstream and redirected upstream.

The column for NVIDIA (NVDA) is worth a closer look. On that day, it rose only 0.84%, the smallest gain among the six stocks. Its price is already near its one-year high, leaving limited upside potential due to its elevated position; in contrast, KLA (KLAC) is in the lower half of its range, so the same amount of capital entering the market would generate a much larger price increase. This difference in potential reflects positional elasticity, not a comparison of which company is better.

The reference point is the closing price on September 4. Breaking down this day, the price surge unfolded in three steps: First, buying pressure began in the storage sector—SK Hynrix rose approximately 7%, SanDisk rose 11.9%, and Micron (MU) rose 6.1%; storage manufacturers were the first to be bought that day. Second, capital flowed up the supply chain, as storage manufacturers place orders for testing and equipment before expanding production, and testing is KLA’s core business. Third, compared to the broader sector, the Nasdaq semiconductor index rose an average of 1.96% that day, while KLA rose 7.32%, outperforming the sector by 5.4 percentage points—this excess gain represents KLA’s relative strength.

The fourth box presents counter-evidence from the same day and cannot offset the first three boxes: the 52-week low level is only at 44%. The first three boxes explain “why it rose today,” while the fourth box addresses “where it stands after the rise”—the answers to these two questions can be entirely different.

One important point to note: On this day, KLA Corporation (KLAC) did not release any company announcements. The price increase stemmed from a broader shift in capital within the equipment and storage sector, not from any new information from the company itself. This creates a practical difference in interpretation—price moves driven by company announcements come with immediate, clear rationale; price moves driven by sector-wide capital flows, however, only reveal their justification later, through order numbers in the next earnings report. Until then, it remains an expectation unverified by actual performance.

The secondary player is Constellation Energy (CEG), which rose 4.88% to close at $298.96 on the day, while the Nasdaq independent power producers index averaged a 5.09% gain. Its similarity to KLA (KLAC) lies in the same business model: nuclear power plants sell their electricity output to data centers through long-term contracts, effectively locking in future production volumes in advance; similarly, storage manufacturers place equipment orders before expanding capacity, turning future production into today’s orders. The market is buying the same thing—future output that has been locked in ahead of time.

The reference point is the earnings report and full-year EPS guidance announced on September 4; price changes reflect the closing price versus the prior trading day. Lululemon (LULU) reported quarterly revenue of $2.4 billion and a gross margin of 60.5%, surpassing market expectations, but comparable sales in the Americas declined by 12%, and the company lowered its full-year EPS guidance from $10.95–$11.15 to $9.48–$9.73; shares fell 17.4% to close at $100.61. Abercrombie & Fitch (ANF) reported quarterly revenue of $1.27 billion, a record for the period and the 15th consecutive quarter of growth, with operating margin improving from 17.1% to 19.9%, and raised its full-year EPS guidance from $10.20–$11.00 to $13.10–$13.60; shares rose 4.3% to close at $149.67.

Both companies had a winning quarter, yet their stock prices differed by 21.7 percentage points. What drove the valuation adjustment wasn’t the revenue line or the gross margin line—it was the guidance line. Lululemon lowered its profit outlook for the coming year, while Abercrombie raised its outlook for the same metric—the market is re-evaluating how much the company will earn over the next year, not how much it earned last quarter.

Why does this happen? Stock prices reflect the future, not the just-completed quarter. The financial results in the report are already history—the market had already priced them in before the announcement, based on expectations. Guidance, however, is the company’s one and only public statement about the future—numbers signed off by management. Therefore, the same earnings report can be both a win and a loss—upbeat on last quarter, disappointing for next year—and the price follows the latter. The only rule: Check the guidance first, then look at the results.

On the same track, the drawdown at either end differs by 17 times.

The unit is %, calculated as (52-week high minus latest closing price) divided by the 52-week high, with the benchmark being the closing price on September 4. The six apparel companies are ranked as follows: Abercrombie (ANF) is down 3.2% from its high, Deckers Outdoor (DECK) down 29.8%, Under Armour (UAA) down 35.6%, On (ONON) down 45.2%, Nike (NKE) down 50.1%, and Lululemon (LULU) down 55.5%. The difference between the extremes is approximately 17 times.

On the same赛道, under the same consumer environment, with identical tariffs and inventory cycles, the drawdowns can differ so drastically. The cycle affects every company equally—the difference lies in whether the market still believes in the next chapter of each company: the one that raised its guidance is nearly touching its all-time high, while the one that lowered its guidance has already dropped by more than half.

Get to know a company—Abercrombie & Fitch (ANF): Founded in 1892, this American apparel group operates Abercrombie for adult customers and Hollister for teens, with both brands sharing the same supply chain and store network, profiting from the speed of style updates. This quarter, its operating margin improved from 17.1% to 19.9%, not by raising prices, but by reducing unsold inventory.

The figures are in percent and represent year-over-year readings for July 2026, the most recently published data before this Friday’s August CPI release. The four measures for July are: overall CPI up 3.4%, core CPI up 2.5%, services excluding energy up 3.0%, and core goods up 0.8%.

This week’s schedule is as follows: Monday—market closed (Labor Day); Tuesday—NFIB Small Business Optimism Index and consumer credit; Wednesday—MBA mortgage applications; Thursday—PPI released at 12:30 UTC, Oracle (ORCL) and Adobe (ADBE) report after market close; Friday—August CPI released at 12:30 UTC, Kroger (KR) reports before market open. (US market hours: open 13:30 UTC, close 20:00 UTC; add one hour during standard time.)

Why the Friday report matters most: It’s the final inflation data before the interest rate decision on September 16. The current policy rate is set at 3.50% to 3.75%, and the central bank has held steady for five consecutive meetings. Inflation determines interest rates, and interest rates determine the prices of stocks and bonds—this is the upstream driver for all asset prices this week.

Focus on core rather than overall, for specific reasons: energy prices are determined by supply and geopolitics, not monetary policy. There’s a 0.9 percentage point difference between overall and core, and both services and goods lines remain close to core, indicating that the overall figure is heavily inflated by energy.

The figures are in percent and represent year-over-year readings for July 2026. Breaking down July: energy commodities (primarily gasoline) rose 24.6%, the only double-digit increase; overall energy increased 14.7%; housing rose 3.2%; services excluding energy rose 3.0%; core goods rose 0.8%.

There is an important point to clarify here: energy commodities themselves are already included under the energy category, so the two figures move together and cannot be added. Seeing 24.6% and 14.7% side by side does not mean the contribution of energy to inflation is the sum of both.

The key comparison to remember is this: gasoline is the one that holds up the overall reading, as it’s the only two-digit figure; core goods rose just 0.8%, offering almost no upward push. Housing rose 3.2%, which may seem modest, but it carries the largest weight within core inflation—whether core continues to decline depends primarily on this category.

So when this Friday’s data is released, interpretation involves two steps: first, check whether the core year-over-year rate holds at 2.5%; second, turn to the housing section. Relying solely on falling energy prices to pull down the overall figure won’t last—because the impact of declining energy prices fades as the base period shifts, while housing is a slow-moving factor; once it sticks, core inflation won’t come down.

Q1: KLA Corporation (KLAC) rose 7.32% in one day—why is its "Trend Position" score only 44 in the five-dimensional rating?

Because they measure two different things. The one-day gain compares performance for today only, while the trend position reflects where the price stands within its 52-week range. On September 4, KLA Corporation (KLAC) closed at $185.60, with its 52-week range being $90.67 to $307.37, placing it at the 44% level—still in the lower half of the range. In the same rating, a perfect score of 100 for industry ranking versus a trend position of only 44 highlights exactly this: no one outperformed it that day, but its overall position remains relatively low.

Q2: There were no company announcements from KLA (KLAC) today—where did the price increase come from?

From a shift in overall capital flows within the storage sector: On that day, SK Hynix rose approximately 7%, SanDisk rose 11.9%, and Micron (MU) rose 6.1%—storage manufacturers were bought first. Before expanding production, storage manufacturers typically place orders for testing and equipment; since testing is KLA’s core business, capital flowed up the supply chain accordingly. Note that these price movements were not supported by company-specific evidence on that day; actual order figures will only be revealed in the next earnings report.

Q3: For the same supply chain, why do some prices rise while others fall?

This isn’t a broad buy-in, but rather a reallocation within the supply chain. On September 4, upstream companies—KLA (KLAC) rose 7.32%, Micron (MU) rose 6.10%, and Lam Research (LRCX) rose 5.12%—while downstream companies—Hewlett Packard Enterprise (HPE) fell 4.48% and Synopsys (SNPS) fell 5.40%. The opposing movements along the same chain indicate capital is being shifted from downstream to upstream. Focusing solely on the sector average (the Nasdaq Semiconductor Index rose 1.96% that day) would completely miss this internal divergence.

Q4: Lululemon reported better-than-expected earnings last quarter—why did its stock still drop 17.4%?

The market is not pricing in last quarter. That report showed revenue of $2.4 billion, a gross margin of 60.5%, and earnings that beat expectations, but comparable sales in the Americas fell 12%. More importantly, the full-year EPS guidance was lowered from $10.95–$11.15 to $9.48–$9.73. The results are history; guidance is the company’s public statement about the future. On the same day, Abercrombie (ANF) raised its guidance from $10.20–$11.00 to $13.10–$13.60, and its stock rose 4.3%—both companies posted strong results last quarter, but the difference was in guidance.

Q5: For Friday’s CPI, which column should you look at first?

First, check whether the core year-over-year rate can hold at 2.5%, then turn to the housing section. In July, the overall CPI rose 3.4% and the core CPI rose 2.5%, a difference of 0.9 percentage points; the overall increase was driven primarily by energy goods (gasoline), which rose 24.6%—the only double-digit increase—while core goods rose just 0.8%. Housing rose 3.2% and has the largest weight within core inflation, determining whether core inflation can continue to decline. Also note: energy goods are already included in the energy category; do not add the two together.