AMD's Data Center Boom: Why the Stock Fell 9%
💡 Key Takeaway
AMD's stellar growth is being overshadowed by flat margins and rising costs, making the stock expensive at 43x forward earnings.
What Happened: A Record Quarter, But a Sell-Off
Advanced Micro Devices (AMD) reported a stellar second quarter, with revenue up 50% year over year to a record $11.5 billion. Data center revenue more than doubled to $6.7 billion, driven by strong demand for its EPYC server processors and Instinct AI accelerators. Adjusted earnings per share surged 82% to $1.66, and adjusted gross margin expanded to 56%.
Despite these impressive numbers, AMD's stock fell about 9% in after-hours trading. The reason? The company's third-quarter outlook showed revenue growth of about 41% year over year, but gross margin is expected to stay flat at 56%. This suggests that the new revenue is coming in at margins no better than the company's existing average.
Additionally, capital expenditures nearly tripled to $808 million in the quarter, as AMD invests heavily in its Helios rack-scale systems and other infrastructure. This spending is pressuring free cash flow, which came in at $1.6 billion, or about 14% of revenue, well below the company's 24% adjusted net income margin.
Investors are also concerned about rising costs in other segments. Client and gaming revenue grew only 6% year over year, and operating margin in that segment slipped to 15% from 21% a year earlier.
The sell-off reflects a broader worry: that AMD's growth is becoming more expensive to achieve, and that profit growth may not keep pace with revenue growth. At $473, the stock trades at about 43 times forward earnings, a significant premium to Nvidia's 21 times.
Why It Matters: Growth at a Cost
AMD's results highlight a critical challenge for the company: maintaining growth while managing costs. The flat gross margin guidance for Q3 is a red flag for investors who expect profitability to improve as revenue scales. If margins don't expand, AMD's premium valuation becomes harder to justify.
The company's heavy investment in Helios rack-scale systems, which are now shipping to major customers like Meta, OpenAI, and Oracle, is a strategic bet on the future of AI infrastructure. However, these early systems are not yet contributing to margin improvement, and the capital spending required is significant.
For investors, the key question is whether AMD can achieve the operating leverage that Nvidia has demonstrated. Nvidia's gross margins are above 70%, while AMD's are at 56%. If AMD can close that gap as Helios production matures, the stock could be a long-term winner. But if margins remain stagnant, the stock may be overvalued.
The sell-off also reflects broader market sentiment about AI stocks. While demand for AI chips remains strong, investors are becoming more discerning about which companies can translate that demand into sustainable profits. AMD's results suggest that the AI boom is not automatically profitable for all players.
Looking ahead, AMD's ability to expand margins will be crucial. The company expects data center sales to accelerate in the second half of 2026, which could provide the scale needed to improve profitability. However, until that happens, the stock may remain volatile.
Source: The Motley Fool
Analysis generated by Bobby AI quantitative model, reviewed and edited by our research team. This is not financial advice. Always do your own research before making investment decisions.
Bobby Insight

Wait on AMD until margins start expanding; the current valuation is too rich.
AMD's growth is impressive, but the flat margin guidance and rising capital spending suggest that profit growth may not keep pace. At 43x forward earnings, the stock is priced for perfection, and any disappointment could lead to further downside. I'd need to see gross margin improvement before considering a buy.
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