Shares of Jabil plunged 10.4% to $285.78 on September 30, even as the contract manufacturer delivered a quarter that beat every key estimate. Adjusted earnings of $4.40 per share topped the consensus of $4.08, and revenue rose 28.5% year-over-year to $10.6 billion, well above the forecasted $9.72 billion. The disconnect between blowout results and a brutal selloff reveals a market repricing what it will pay for growth that carries real execution risk.

The Numbers Were Strong — But the Market Had Already Priced Them In

The FY2027 guide of 6.1% core operating margin represents just 30 basis points of improvement on a much larger revenue base — solid, but not a dramatic leap. And a low-single-digit beat over consensus on revenue and EPS can be absorbed quickly by a stock that had already run up sharply. Jabil's shares rose from $308.75 to $318.84 in the week before the report, suggesting much of the good news was already baked in.

A Massive Factory Buildout Raises the Stakes

Jabil is adding approximately 4 million square feet of manufacturing capacity across Southeast Asia, the U.S., Mexico, and India, which raises execution risk if demand or program ramps slow.

Investors appear to be looking past the headline beat and focusing on the company's heavy capacity buildout and back-end-loaded margins — meaning profits are expected to arrive later in the fiscal year, not immediately. If those factories don't fill on schedule, the cost hits earnings before the revenue shows up.

AI Is Doing the Heavy Lifting — And That Cuts Both Ways

Jabil expects AI-related revenue to reach $22.1 billion in FY2027, up 54% year-over-year, with five customers each exceeding $1 billion in AI revenue. That concentration is a double-edged sword: any slowdown in hyperscaler spending would hit Jabil disproportionately. A third hyperscaler customer is expected to contribute a couple hundred million dollars in FY2027 and could grow past $1 billion by FY2028 , but those dollars are still mostly promises.

The Profit Quality Question Lingers

The sharpest improvement in reported profitability came from lower restructuring charges rather than broad margin expansion.

Gross margin has improved more than 200 basis points since fiscal 2020 to 9.2%, and core return on invested capital has nearly tripled to 59%. The long-term trajectory is real — but today's selloff is the market demanding proof that new capacity will convert into sustainable profit, not just bigger revenue.