AMD's stock dropped 7% in after-hours trading Tuesday even as the chipmaker posted record quarterly revenue of $11.54 billion, up 50% year over year. The sell-off wasn't about weak results. It was about the bill coming due. Capital expenditures nearly tripled to $808 million in Q2, more than double the $389 million AMD spent in the prior quarter and nearly three times the $282 million from a year ago.

The spending binge is eating into cash generation. Free cash flow fell to $1.56 billion from $2.57 billion in Q1, though it still beat the $1.18 billion from the same quarter last year. Operating cash flow dropped to $2.37 billion from $2.96 billion sequentially. For the first half of 2026 alone, AMD has committed $1.2 billion to capital projects compared with $494 million in the first half of 2025. That's a 143% jump in just six months.

The Data Center Juggernaut

AMD's core business is humming. Data center revenue exploded to $6.72 billion from $3.24 billion a year earlier, fueled by demand for EPYC processors and Instinct AI accelerators. That segment now accounts for 58% of total revenue and generated $2.1 billion in operating income. Client revenue climbed 23% to $3.06 billion, though gaming stumbled 31% to $779 million due to lower semi-custom sales. Embedded grew 19% to $977 million.

Adjusted earnings hit $1.66 per share versus $0.48 a year ago. On a GAAP basis, net income reached $2.3 billion, or $1.38 per diluted share, crushing the $872 million or $0.54 per share from the prior year period.

The Capex Question

Wall Street's anxiety centers on whether AMD can sustain both growth and profitability while pouring cash into manufacturing and infrastructure. The company ended Q2 with $13.11 billion in cash and short-term investments, up from $12.35 billion in Q1, but debt held steady near $3.23 billion. For Q3, AMD guided to revenue around $13 billion, implying 41% year-over-year growth and 13% sequential growth.

The math looks solid on paper. Whether investors believe the capex will pay off is another question entirely.

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