Cisco Set a Revenue Record and Fell 9%: Memory Costs Are Why

One Story, Priced in Two Directions

On Thursday, August 13, two groups of stocks in New York moved in exactly opposite directions. Both moves had the same cause: the price of memory chips.

That morning, SanDisk used its investor day to lay out a long-term model targeting an adjusted gross margin near 80% for fiscal 2028 through 2030. The stock rose 15.3%. In South Korea, SK Hynix gained 7.8%; Micron added 5.1%.

In the same session, Cisco fell 9.3%.

The night before, on August 12, Cisco had reported the largest quarterly revenue in its history: $17.3 billion, up 18% from a year earlier. Adjusted earnings of $1.22 per share, up 23%. AI infrastructure orders of $4 billion in the quarter alone and $9.3 billion for the full fiscal year — roughly 4.5 times the prior year's total. Its revenue guidance for fiscal 2027, $72.2–$73.4 billion, also came in above consensus.

Five brokerages raised their price targets after the print. The stock still shed about $41 billion in market value in a single day.

The link sits in one line of the income statement: Cisco's adjusted gross margin fell from 68.4% to 66.3% in a year. Two point one percentage points. This piece is about where those 2.1 points went — because they went into the revenue line of the very stocks that rose 15% that same day.

The first three of those figures come from the income statement; the fourth came from the market. What connects them is a simple division problem, worked through below.

Inside the Record: Rising Revenue, Falling Percentage

Cisco's fiscal 2026 ended on July 25. Fourth-quarter product revenue rose 24% to $13.5 billion, while services revenue was flat at $3.8 billion. Full-year revenue reached $63.3 billion, up 12%.

As the box count climbed, the revenue mix tilted toward hardware. CFO Mark Patterson said so plainly on the earnings call: "We are in a networking super cycle and shipping high volumes of hardware, which increases the revenue mix to hardware and creates a slight gross margin headwind."

The word "slight" matters here, because for the company it genuinely was. Operating expenses fell 3.7 percentage points as a share of revenue — meaning the entire 2.1 points lost at the gross line, and then some, was clawed back through cost discipline. Adjusted operating margin reached 35.9%. Patterson steered investors toward that number, arguing operating margin is the better measure of profitability.

The market looked elsewhere. It looked at the gross margin itself, because gross margin does not measure how well a company is run. It measures where that company stands in its supply chain.

The Memory Inside the Network

A network switch is, roughly speaking, a fast computer. It needs memory to queue packets, hold routing tables and buffer traffic. In AI data centers that requirement has grown: the switches that stitch thousands of accelerators together need deeper buffers and larger tables.

Patterson quantified the exposure: "Unlike other companies that may have a majority of their products that are servers, 95% of what we sell are not servers... roughly 15%-20% of the bill of materials might be memory related."

He offered that as a defense — we are less exposed than Dell or Super Micro. But the same sentence also describes exactly where the margin went.

At the first link of that chain, a price increase is a revenue line. At the third, it is a cost line. The same number appears in two income statements with opposite signs.

The Mechanism: Where 2.1 Points Went

Cisco's first response was to raise prices. Patterson measured the effect: price increases contributed roughly five points to quarterly revenue growth, and the increases were applied specifically to hardware with higher memory content.

Now run the arithmetic.

Not all of it came from memory; management split the compression between product mix and component cost. But the order of magnitude points to the right place. TrendForce's July 9 note projects server DRAM contract prices rising 13–18% quarter over quarter in the third quarter of 2026 alone. A cost line compounding at that pace for four quarters produces roughly a 70% annual increase. The arithmetic holds.

Look at it in dollars, too. Year-ago quarterly revenue was $14.7 billion; at a 68.4% margin, that is $10.0 billion of gross profit. This quarter, 66.3% of $17.3 billion is $11.5 billion. Revenue grew 18%; gross profit grew 14%. Had the margin held, gross profit would have been $11.8 billion. The gap is roughly $0.36 billion in a single quarter — call it $1.4 billion annualized. That is the invisible memory bill Cisco paid over a year.

And the company said this does not stop here: adjusted gross margin guidance for the first quarter of fiscal 2027 is 65–66%. Another point of compression is already planned. What sank the stock was not the past quarter. It was that guidance.

Who Has a Contract and Who Doesn't

The memory increase does not land on everyone equally, and that is where the market's real dividing line runs.

TrendForce's July note is explicit: several U.S. cloud service providers have signed multi-year supply agreements that restrict suppliers from raising prices for those customers. The increases therefore fall on buyers without such agreements, and on incremental supply sold outside them.

The framework SanDisk unveiled on August 13 is the same structure seen from the other end: eight customers have signed multi-year deals covering roughly half of fiscal 2027 chip shipments and about two-thirds of fiscal 2028, with committed volumes and pre-agreed pricing. That is why it can promise a gross margin near 80% out to 2030.

Cisco is not on that list. Its approach has been different: a direct relationship with TSMC with no middleman in between, and investments in memory suppliers such as Nanya. Patterson said supply is not the constraint — the company has enough material to meet its fiscal 2027 guide and to exceed it if demand strengthens. Note what he was talking about: quantity, not price.

Same day, same news flow, four names. The only difference between them is which line of the income statement the memory price gets written on.

Read the chart as scale, not as proof: the stock had run hard through the year, and the drop landed on top of that advance.

The Dow's One-Sided Basket

Thursday produced an odd picture: QQQ, which tracks the Nasdaq 100, rose 1.33%, while DIA, which tracks the Dow Jones Industrial Average, finished essentially flat at +0.07%. Same market, two different answers.

The reason is how the Dow is built. It is price-weighted: a member's influence depends not on the company's size but on the dollar level of its share price. At the current divisor, a $1 move in any Dow component is worth roughly 5.94 index points.

Assuming an index represents "the market" means assuming both sides of a story sit in its basket. On Thursday that assumption did not hold.

The Other Side of the Trade

Both columns are reading the same report. Where they part company is whether the margin move is a temporary mix effect or a permanent loss of leverage.

What's Left Standing

Memory supply is expected to stay tight into the second half of 2027; TrendForce projects server memory module bit supply growing only 15–20% year over year, trailing the increase in server CPU shipments. Cisco's bill is not a one-off item.

One consequence follows. The profit from AI investment does not accumulate evenly along the chain. The same capital expenditure wave that lifts a memory maker's margin toward 80% pushes the margin of the company buying that memory and putting it in a box down by two points. Both get filed under "AI winners."

Earnings figures in this piece come from Cisco's fourth-quarter press release of August 12, 2026 and the transcript of the investor call held the same day. Memory contract pricing data is drawn from TrendForce's July research notes; intraday share and index moves are from the August 13, 2026 session close. The gross margin calculation is a model built for this article from the company's reported margin ratios and the bill-of-materials and price-increase figures management gave on the call; it is not a company disclosure.