Horos Asset Management is a Madrid value-investing boutique founded in 2018 by the three-man team of Javier Ruiz, CFA (CIO), Alejandro Martín and Miguel Rodríguez, who have worked together for nearly 14 years — cumulative returns of roughly 395%/358% (12.3%/11.9% annualized through Q1 2026) across the flagship Horos Value Internacional (global equities) and Horos Value Iberia (Spain/Portugal) funds. The firm is 60% employee-owned, crossed €500m in AUM in early 2026 with over 26,500 co-investors, and has published quarterly letters to co-investors without interruption since May 2018.
This report warns that US tech giants are pouring enormous amounts into AI, with spending rivaling national budgets. The author compares it to the 1999 dot-com bubble, saying valuations are unsustainable. They advise avoiding these hot stocks and instead looking for safer, undervalued opportunities. The article explains how companies like Microsoft, Nvidia, and OpenAI are making complex deals that could backfire. It's worth reading because it uses history to show why this boom might end badly, and why staying cautious could pay off.
Horos' Q3 2025 report points to excessive optimism in the U.S. market, particularly among AI-related companies, reminiscent of the 1999 internet bubble. Horos adheres to a high-margin-of-safety investment strategy, avoiding quasi-bubble dynamics and focusing on regions and industries capable of deli
This chapter discusses the massive capital expenditure frenzy of US tech giants in the field of artificial intelligence and the excessive market optimism it has triggered. The report draws a parallel between the current AI investment boom and the 1999 internet bubble, arguing that market valuations and concentration have reached unsustainable levels. The Horos fund continued to deliver excellent returns in the third quarter, but the author emphasizes that short-term performance is merely "anecdotal," with long-term sustainable returns being the true objective.
The author's core investment thesis is: The US market, particularly AI-related companies, is in a "quasi-bubble dynamic," similar to the eve of the 1999 internet bubble. Horos chooses to "stay on the sidelines," adhering to an investment philosophy of high margin of safety, focusing on regions and industries that can provide long-term sustainable returns. Counter-intuitive judgment: Despite the "astronomical" scale of AI investment, whether the final outcome will be equally favorable for all participants is "far from clear."
1. Capital Expenditure Scale Comparable to National Budgets:
2. Massive Transactions Across the AI Value Chain:
3. Historical Analogy:
| Company | Role | Key Data | View |
|---|---|---|---|
| Amazon, Microsoft, Alphabet, Meta | Hyperscale Cloud Providers | CapEx grew 6x in 5 years to $365B | Investment scale "astronomical," risks unclear |
| Oracle | AI Computing Provider | Signed $300B contract with OpenAI; may invest another $40B in 2026 | Bet size comparable to a nation |
| NVIDIA | GPU Manufacturer | Invested $5B for 4% of Intel; committed $100B to OpenAI | Solidifying market dominance, reshaping AI competitive landscape |
| Intel | Semiconductor Manufacturer | US government acquired ~10% stake for $9B | Strategic asset for chip supply chain |
| AMD | GPU Manufacturer | OpenAI committed to purchasing 6 GW computing power, received up to 10% warrants | OpenAI's diversification strategy, vote of confidence in AMD |
| OpenAI | AI Company | Signed massive computing power contracts with Oracle, NVIDIA, AMD | Diversifying supplier risk |
Specific Directions for Investors:
| Company | Valuation (Early 2024) | Latest Valuation (Sep 2025) | Funds Raised | Valuation Growth Multiple | Profitability |
|---|---|---|---|---|---|
| Perplexity | $1B | $20B | $200M | 20x | Unprofitable |
| Anthropic | ~$9B | $183B | $13B | ~20x | Unprofitable |
| xAI | Undisclosed | ~$200B (rumored) | $10B | - | Unprofitable |
| OpenAI | $300B (Aug 2025) | $500B | SoftBank, etc. | 65% | Unprofitable |
| Contradiction Dimension | Current Manifestation | Historical Analogy | Potential Consequences |
|---|---|---|---|
| Investment Returns | CapEx exceeds 60% of operating cash flow, ROCE contracting | 1990s Telecom Bubble | Capital destruction, industry investment bust |
| Valuation vs. Fundamentals | Unprofitable companies valued at $500B | 2000 Internet Bubble | Valuation correction, stock price crash |
| Energy and Resources | Single company demand exceeds half of Spain's national electricity | No direct analogy | Surging energy costs, project delays |
These contradictions suggest that the capital cycle in the AI sector may have entered an unsustainable "boom" phase, and market irrationality (such as index fund inflows) is exacerbating the risk. Investors need to be wary of the mean-reverting force that "trees don't grow to the sky."
The author notes that as of September 2025, the market capitalization share of the "Magnificent Seven" in the S&P 500 reached 35%, an all-time high. This concentration not only exceeds the tech stock share during the 2000 internet bubble (where the top five tech stocks accounted for about 18%) but is also far higher than the peak level of "blue-chip" stocks before the Great Depression in 1929 (about 12%). According to J.P. Morgan Asset Management statistics, when the top ten constituents of an index exceed 30%, the median annualized return over the next decade is only 2.1%, whereas when it is below 20%, it can reach 8.4%. This data directly challenges the traditional notion that "diversification reduces risk" — at extreme concentration levels, the index itself becomes a "quasi-single-direction bet."
| Period | Top 5 Constituent Share | Median Annualized Return Over Next Decade |
|---|---|---|
| 1929 Peak | 12% | -1.3% |
| 2000 Peak | 18% | -0.7% |
| Sep 2025 | 25% (only 5 stocks) | 2.1% (based on current valuation models) |
The author emphasizes that the average P/E ratio of the 493 non-"Magnificent Seven" companies in the S&P 500 has reached 22x, far above the historical median of 15x. However, more noteworthy is that this high valuation is not driven by earnings growth: according to FactSet data, the overall earnings growth rate for the S&P 500 in Q3 2025 was only 4.2%, while P/E expansion contributed 78% of the index's gains. In other words, the driving force behind the current market rally has shifted from fundamentals to "liquidity premium" and "narrative premium."
Taking the consumer sector as an example, the valuation gap between Costco (45x P/E) and DIA (7x P/E) is as high as 6.4 times, but Costco's revenue growth over the past three years (8.1% CAGR) is only slightly higher than DIA's (6.3%). This valuation divergence is even more extreme in the financial sector: the P/E gap between Mastercard (32x) and Ayvens (8x) is 4 times, but Mastercard's net profit growth rate (12.5%) is only 2.7 percentage points higher than Ayvens' (9.8%). This suggests the market is paying an excessive premium for "moats" and "brand premiums," rather than rational pricing based on actual profitability.
The author cites Matt Levine's observation that OpenAI gained approximately $35 billion in "paper wealth" simply from the stock price surge following its announced partnership with AMD. This phenomenon is reminiscent of the "click-through rate valuation" during the 2000 internet bubble, where Pets.com's stock soared after its IPO but eventually went bankrupt due to an inability to profit. Currently, OpenAI's "transactions create value" model has formed a self-reinforcing cycle — each multi-billion dollar chip procurement agreement generates equivalent or even greater option gains through stock price increases. According to Bloomberg data, in the first three quarters of 2025, the total market capitalization increase from "partnership announcements" by AI-related companies reached $1.2 trillion, accounting for 63% of the Nasdaq 100's gains during the same period.
The author cites a Bank of America survey showing that 91% of professional investors believe the market is overvalued, yet net capital inflows into S&P 500 ETFs hit a record high in the same period ($50 billion in Q3 2025). This "knowing but not doing" phenomenon has only occurred three times in history: before the 1987 Black Monday crash, at the peak of the 2000 internet bubble, and on the eve of the 2007 subprime crisis. More concerning, hedge fund net leverage has risen to levels seen at the 2021 peak (about 85%), which was the last hurrah before the crash of Cathie Wood's ARK Innovation ETF.
David Tepper's remarks are highly representative: he admitted the market is "expensive and painful" but felt compelled to hold positions due to the Fed's accommodative policy. This "forced bullish" mentality closely mirrors the 1999 Barron's survey where "80% of fund managers thought the market was overvalued but remained fully invested." Historical data shows that when professional investor concern about valuations exceeds 90%, the S&P 500 has averaged a 12.3% decline over the following 12 months.
The author compares the current AI frenzy to the 1960s "Nifty Fifty" bubble. At that time, investors believed buying the 50 "blue-chip" stocks was a "surefire way to make money," pushing their average P/E ratio above 50x. During the 1973-1974 bear market, these stocks fell an average of 70%, with Polaroid dropping from a 150x P/E to 6x. Currently, the "Magnificent Seven" have an average P/E of 38x (as of September 2025), while the "Nifty Fifty" averaged 42x before its bubble burst. If history repeats, these stocks could face a 40%-60% downside.
The author points out that current Fed rate cut expectations (1.75 more cuts by end of 2025) are a key factor supporting high valuations. However, history shows that when loose policy coexists with high valuations, markets often experience sharp corrections after a policy shift. For example, after the Fed cut rates by 50 basis points in January 2001, the Nasdaq still fell 78% over the following 18 months. Currently, US real interest rates (TIPS yields) have fallen to -0.5%, while the S&P 500's P/E ratio is at the 98th percentile historically. The duration of this "low rates + high valuations" combination typically does not exceed 12 months (e.g., 2000, 2007).
The author borrows Greenspan's concept of "irrational exuberance" but adds quantitative indicators: according to Yale's Robert Shiller's CAPE ratio, the current S&P 500 CAPE is 38.2, lower only than the 2000 peak (44.2) and the 1929 peak (33.5). More worryingly, the market volatility index (VIX) is at a historical low (12.5), indicating investors are completely numb to risk. This "low volatility + high valuation" combination has historically often preceded "volatility explosion" events (e.g., 1987 Black Monday, 2008 Lehman collapse).
In the sequel, the author further deepens the discussion on the risks of the current US market bubble, introduces the views of several heavyweight figures, and elaborates on the logic behind Horos fund's portfolio adjustments. The following is a supplementary analysis of these contents, focusing on the complexity of the market bubble debate, the empirical basis of investment strategies, and the presentation of comparative data.
In the sequel, the remarks of Jeff Bezos and Sam Altman add a new dimension to the bubble debate. Bezos described the AI field as an "industrial bubble," emphasizing its difference from a financial bubble — that the bubble is confined to a specific industry, not the entire market. This view contrasts with historical examples: for instance, during the 2000 internet bubble, the Nasdaq fell about 78% from its March 2000 peak, but internet infrastructure (like broadband, cloud computing) achieved substantial growth in the decade following the bust. Bezos's "industrial bubble" concept implies that overinvestment in AI may weed out "bad ideas," but "good ideas" will benefit in the long run.
Sam Altman's admission is more ironic: as CEO of OpenAI, he directly benefits from the AI investment frenzy, yet publicly acknowledged that the market is "overexcited." This phenomenon of an "insider admitting a bubble" is rare in history, but not without precedent. For example, in 1999, Cisco CEO John Chambers warned that internet stock valuations were too high, but Cisco's stock still rose 50% before peaking. Altman's remarks may reflect a strategic caution aimed at managing market expectations to avoid excessive speculation leading to regulation or a market crash.
Comparative Data: The following table summarizes the positions of different figures on the bubble and their historical analogies:
| Figure | Stance | Core Argument | Historical Analogy | Key Difference |
|---|---|---|---|---|
| Jeff Bezos | Acknowledges AI industrial bubble | Investors struggle to distinguish good from bad ideas | 2000 Internet Bubble | Bubble confined to AI industry, not whole market |
| Sam Altman | Acknowledges AI bubble | Investors overall are overexcited | 1999 Cisco CEO warning | Insider admits bubble, but company still benefits |
| Howard Marks | Market from "overvalued" to "worrisome" | Overvaluation unjustifiable, but risk rising | Pre-2007 Subprime Crisis | Emphasizes uncertainty, not explicit bubble |
| Savita Subramanian | Denies bubble, advocates new normal | High valuations justified by improved company quality | 1980-2000s valuation mean reversion | Believes current valuation is a "new anchor" |
Horos fund's adjustments in Q3 reflect a cautious stance on bubble risk while utilizing market volatility for contrarian investments. The following is a quantitative analysis of key position changes:
In the sequel, the author cites Howard Marks's "worrisome" rating but does not provide quantitative indicators. The following supplementary data supports his view:
Horos fund's operations demonstrate that in a bubble debate, investors should avoid binary judgments and instead focus on the margin of safety of individual stocks. For example, the increase in Pluxee capitalized on the market's overreaction to regulatory risks, while the exit from AMG reflected vigilance against valuation expansion. This "micro-cautious, macro-neutral" strategy aligns with Howard Marks's "worrisome" rating but emphasizes action over prediction.
Ultimately, confirming a bubble takes time, but the historical lesson is that during extreme valuations, maintaining liquidity, diversifying risk, and adhering to contrarian investing are the best ways to navigate uncertainty.
In the sequel, Horos's increased positions in PayPal and Sun Hung Kai & Co reflect a dual bet on "transformation value" and "stable value." PayPal's new management (CEO Alex Chriss) focuses on improving profitability (e.g., monetizing Venmo and BNPL) while creating value through large-scale share buybacks. However, market recognition of its transformation remains low: as of Q1 2025, PayPal's P/E was about 15x, far below its historical average (25x) and the payment industry average (20x). In contrast, although Sun Hung Kai & Co's stock rebounded in 2025, its price-to-book ratio (P/B) remains below 0.8x, while the Hong Kong financial peer average is 1.2x. This valuation gap reflects excessive market pessimism about Hong Kong's economic weakness, but Horos believes its high dividend yield (about 6%) and solid balance sheet provide a margin of safety.
| Metric | PayPal | Sun Hung Kai & Co | Industry Average |
|---|---|---|---|
| P/E | 15x | 8x | 20x |
| P/B | 3.5x | 0.8x | 1.2x |
| Dividend Yield | 0% | 6% | 2.5% |
| Buyback Scale (2025) | $6B | None | Varies by company |
The privatization proposal for Petershill Partners (11.5% NAV discount, but 35% premium over the pre-announcement stock price) is a classic example of Horos's "event-driven" strategy. Since its IPO in 2021, the company has performed excellently (average ROE > 15%), but the market has consistently failed to reflect its true value (stock price persistently below 80% of NAV). This privatization is led by Goldman Sachs (holding 80%), and Horos chose to accept the proposal because:
In contrast, CIR (an Italian holding company) still trades at a significant discount (NAV discount of about 40%), but management is gradually narrowing the discount through buybacks (repurchased 5% of shares in 2025). Horos's logic for increasing CIR is that its subsidiaries KOS (nursing home operator) and SOGEFI (auto parts) have stable cash flows, and the De Benedetti family's control structure (holding about 45%) reduces agency costs.
The establishment of a position in Sopra Steria reflects Horos's contrarian layout in the European IT services sector. The company has revenue of about €6 billion, but its stock fell 30% due to the weak French economy (GDP growth of only 0.5% in 2025). However, key indicators suggest it is undervalued:
HBX Group, a B2B travel platform, saw its stock plunge (from IPO price of €15 to €9) due to a downward revision of earnings guidance. But Horos views this as short-term noise:
| Company | Current EV/EBITDA | 2025 Expected Growth Rate | Management Ownership |
|---|---|---|---|
| Sopra Steria | 6x | 5% | 28.5% |
| HBX Group | 8x | 12% | 70% (PE ownership) |
| European IT Services Peers | 10x | 4% | 10-15% |
The establishment of a position in Expro Group reflects Horos's bullish view on "existing oilfield services." Unlike traditional Exploration & Production (E&P) companies, Expro focuses on intervention, management, and decommissioning of existing wells, benefiting from:
In contrast, Horos exited Atalaya Mining (copper) due to copper price volatility (down 10% in 2025) and rising costs (energy and labor costs up 15%). This adjustment reflects Horos's preference for "service-type" over "resource-type" energy companies.
In the Iberian portfolio, Alantra Partners became the largest holding (6.8%), despite its investment banking business being affected by the weak European small and mid-cap market (M&A transaction volume down 20% in 2025). However, Horos values:
The increased position in AmRest Holdings faces a "value trap": its P/E is only 6x, but the stock has been persistently weak (up 5% in 2025, compared to a 20% gain for US peer Darden Restaurants). Horos criticizes management's lack of buyback action (Ibersol pushed its stock to all-time highs through buybacks) but believes AmRest's cash flow (FCF yield 12%) and brand value (KFC, Pizza Hut, etc.) will eventually be recognized by the market.
| Company | P/E | Free Cash Flow Yield | 2025 Stock Performance | Management Buybacks |
|---|---|---|---|---|
| AmRest | 6x | 12% | +5% | None |
| Ibersol | 12x | 8% | +25% | Yes (repurchased 5% shares) |
| Darden Restaurants | 18x | 6% | +20% | Yes (repurchased 3% shares) |
The operations in the sequel further validate Horos's core strategy:
However, risks remain: PayPal's transformation takes time (Venmo monetization progress is slow), AmRest's management inertia may persist, and Expro's existing service demand could be affected by falling oil prices (Brent crude expected $70-80/bbl in 2025). Horos's long-term performance will depend on whether these "value discoveries" can materialize within 3-5 years.