u/JoeInOR ·
Reddit — r/ValueInvesting
· May 05, 2026 at 12:23
· ⬆ 16 pts
· 💬 31 comments
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Summary
The author analyzes "True Free Cash Flow" (OCF minus CapEx minus SBC) for the Magnificent 7 over 16 years, finding that Google, Amazon, Meta, and Microsoft are seeing declining or negative True FCF despite revenue growth, due to massive AI-related CapEx.
The thesis: The market is pricing all six (ex-Nvidia) as winners in an AI arms race where the math only works if at least one loses — either CapEx stops and tolls are collected, or Nvidia keeps winning. The high P/True FCF multiples (Google 86x, Meta 67x) suggest overvaluation.
Quality assessment: Well-researched DD using SEC XBRL filings and a Python script, with clear data and a logical framework. The author provides specific numbers and links to full charts.
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We've all heard the AI capex story. I wanted to see the physical cash reality.
I got tired of net income headlines so I wrote a Python script to pull 16 years of SEC XBRL filings for every stock that's ever been in the S&P 500. I calculated True Free Cash Flow (Operating Cash Flow minus CapEx minus Stock-Based Compensation) for the Magnificent 7 to see who's actually printing cash and who's burning it building data centers.
Here's what the earnings releases aren't showing you:
**The ugly:**
* Google's True FCF shrank from $47B to $46B while revenue grew 31%. CapEx nearly tripled — $32B to $91B.
* Amazon's True FCF went negative in 2025 at -$11.8B. $131B in CapEx will do that.
* Meta's True FCF fell 14% while Zuckerberg told everyone the AI bet was paying off.
* Microsoft peaked at $63B True FCF in 2024, fell to $59.6B in 2025.
**The exception:** Nvidia. True FCF went from $2.9B to $56B in two years. They're the toll booth everyone else is paying.
**The logical problem:** The market is pricing all 6 as winners of an arms race where the math only works if at least one loses. Either CapEx spending ends at some point and they collect tolls like Buffett's bridge — or they keep feeding Nvidia indefinitely. Both sides can't win the bet simultaneously.
The P/True FCF multiples tell the real story. Google is at 86x. META is at 67x. These are growth prices for companies whose truest measure of cash generation is going backwards.
There's also a structural reason valuations stay this high despite the math — Gabaix and Koijen's inelastic market hypothesis. For every $1 of active buying, passive flows inject $5. Elon Musk knows this, which is why he wants SpaceX in the S&P 500.
Full 16-year charts on my Substack. [https://cavemanscreener.substack.com/p/building-bridges-to-nowhere-the-magnificent](https://cavemanscreener.substack.com/p/building-bridges-to-nowhere-the-magnificent)
Nvidia's True FCF surged from $2.9B to $56B in two years — it is the "toll booth" everyone else pays. As the six Mag 6 companies spend billions on AI chips, Nvidia captures their cash, creating a virtuous cycle of FCF growth. Long Nvidia as the structural beneficiary of the AI capex arms race, with True FCF multiple still reasonable relative to growth. Competitors (AMD, custom chips) could erode market share; capex cycle could slow sooner than expected.
Google's True FCF shrank from $47B to $46B while revenue grew 31%; CapEx nearly tripled to $91B. The market prices Google at 86x P/True FCF, a growth multiple for a company whose core cash generation is stagnant. Short opportunity as the market re-prices Google from growth to value, compressing the multiple when capex normalization fails to materialize. AI capex could eventually yield revenue growth that justifies spending; passive flows may sustain valuation.
Amazon's True FCF went negative -$11.8B in 2025 due to $131B in CapEx. A company burning cash to build data centers with no near-term FCF inflection creates downside risk when growth expectations reset. Short Amazon as the market eventually recognizes negative True FCF is a structural problem, not a temporary investment phase. AWS revenue growth could accelerate; market may continue to ignore cash burn if top-line growth remains strong.
Meta's True FCF fell 14% even as Zuckerberg claimed the AI bet was paying off. The discrepancy between management narrative and true cash generation sets up a disappointment when earnings releases fail to show FCF improvement. Short Meta as expensive capex continues to erode free cash flow, forcing a valuation multiple contraction. AI-driven ad revenue growth could reverse the FCF decline; strong user engagement may maintain sentiment.
Microsoft's True FCF peaked at $63B in 2024, then fell to $59.6B in 2025. Even the most diversified Mag 6 member is showing FCF erosion; the market has not priced in this peak-FCF scenario. Short Microsoft as the trend of declining True FCF continues, leading to multiple compression from current elevated levels. Azure and AI revenue could accelerate, reversing FCF decline; strong balance sheet buffers short-term pain.
This Reddit post, published May 05, 2026,
features u/JoeInOR
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