Marvell falls after record revenue and raised long-term guidance

Marvell Technology, Inc. (NASDAQ: MRVL ) posted the best quarter in its history and lifted two years of guidance.

The company gave investors what they wanted, but they sold it anyway.

Marvell delivered record second-quarter revenue of $2.739 billion, up 37% year over year.

It also raised fiscal 2027 revenue guidance to roughly $12 billion from $11.5 billion.

Fiscal 2028 guidance jumped another $1.5 billion to approximately $18 billion.

Yet shares fell more than 8% before Friday's open.

That contradiction reveals what has changed.

Marvell's AI opportunity is growing, but investors now need to know how quickly it becomes profitable growth.

Marvell's AI Business Is Booming The underlying numbers are difficult to dismiss.

Data center revenue reached a record $2.17 billion, up 46% year over year.

Marvell expects data center revenue to grow more than 20% sequentially and roughly 75% year over year in the third quarter.

The company also raised its fiscal 2027 data center growth forecast from approximately 50% to 60%.

The longer-term picture is even more striking.

Marvell now expects data center revenue to grow more than 60% in fiscal 2028.

Its custom business is expected to more than double, while scale-up optics is accelerating faster than previously expected.

In other words, the AI story is not weakening.

It is getting bigger.

So why is Marvell stock falling? Read Also: Nvidia's AI Boom Hits Its First Margin Wall: Memory Prices The Margin Pressure Is Real, But Temporary The immediate problem is product mix.

Marvell expects third-quarter revenue of $3.15 billion at the midpoint.

That implies 15% sequential growth and more than 50% year-over-year growth.

Gross margin — the portion of every sales dollar left over after paying to manufacture the chip — is guided to 57.5% to 58.5%, down from 58.9% last quarter.

Roughly one cent less per dollar sold.

The company makes two kinds of chips.

Standard ones, sold to many customers off the shelf.

And custom ones, designed to order for a single cloud company.

Custom chips bring in enormous revenue, but they earn less profit per sale.

Custom is the part growing fastest.

Marvell expects it to more than double next fiscal year.

The faster it grows, the more it pulls the company average down. "Mix is the primary driver.

We've got a strong ramp in custom," CFO Daniel Durn said.

Custom silicon is growing rapidly, but that growth creates a temporary margin headwind.

There is an important offset.

Marvell's second-quarter non-GAAP operating margin reached 36.6%, up 180 basis points year over year.

Management expects to enter its 38%—40% long-term operating-margin range in the fourth quarter.

So the market is not facing a collapsing margin story.

It is facing a timing problem.