The Great AI Melt-Up: FOMO, CapEx, and the Psychology of the 2025 Bull Market

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Written By pyuncut

Q4 Investing Infographics Report — October 06, 2025

Q4 Investing Infographics Report

Compiled: October 06, 2025

Market Valuation
Slight Premium
Risk Posture
Tightrope
Playbook Tilt
Small & Value
Key Watch
Alt Data & Earnings
PMI/ISM: Prices edging up ADP: -33k Sept Fed: Cut bias with caution Earnings: Pepsi, Delta
Valuation by Market Cap chart
Small caps screen cheapest (~–16% vs. fair value). Large caps trade rich; mid caps near fair.
Valuation by Style chart
Value at a discount, Core slightly rich, Growth at a rare double‑digit premium.
Sector valuation premiums and discounts
Utilities & Financials look fully priced; Real Estate, Energy, and Healthcare offer the cleanest discounts.
Market concentration metrics
Returns broadened in Q3, but the top‑10 still dominate market cap.
Alternative data snapshot
Alt‑data: Payroll softness with pricing still firm at the margin; a mixed signal for the Fed.

Earnings Watch: Signals on the Consumer

PepsiCo (PEP)

Wide moat, defensive cash flows, dividend ballast. Watch activist commentary and pricing/volume elasticity for consumer health.

  • Dividend ~4%
  • Discount to fair value (double‑digit)
  • Focus: Brand power, distribution, capital allocation

Delta Air Lines (DAL)

Strong near‑term margins, but structurally cyclical with high fixed costs and no moat. Priced for perfection.

  • Dividend ~1.3%
  • Premium to fair value
  • Watch: Bookings, yields, unit costs into shoulder season

Post‑Earnings Debriefs

Carnival (CCL)

Guidance raised; net yields up, costs down; deposits up. Modest undervaluation remains, but the easy “reopening” gains are behind us.

  • FY EPS outlook lifted (~$1.97 → ~$2.14)
  • Demand: Cruises still cheaper than land vacations
  • Focus: Debt trajectory, pricing power

Nike (NKE)

Mixed: China soft; ex‑China growth offset to +1% total sales. Margin compression on marketing & tariffs.

  • Operating margin ~7.7% (from ~10.9%)
  • Next quarter: small sales decline; GM −300–375 bps (≈175 bps tariffs)
  • Patience play for share recapture

Q4 Stock Ideas

Ticker Company Thesis Moat/Uncertainty Valuation Framing Key Risks
LPLA LPL Financial Largest U.S. independent broker‑dealer; leverage to AUM growth and advised‑asset secular trend. Wide / High Material discount vs. intrinsic value Market beta; fee/take‑rate pressure
IEX IDEX Niche leaders; disciplined M&A; margin normalization as macro/tariff drag fades. Wide / Medium ~20% discount vs. intrinsic value Macro softness; policy/tariff volatility
FRPT Freshpet Growth reset after 2024 surge; mid‑teens topline with fixed‑cost leverage. No Moat / High Deep discount; high dispersion outcomes Execution; category elasticity
GEHC GE HealthCare Oligopoly in imaging/ultrasound; backlog support; tariff workarounds drive margin recovery. Wide / Medium Low‑teens discount, reasonable multiple China capex; order conversion timing

European Angle

Europe trades at a small discount vs. U.S. slight premium—less concentration, broader sector drivers.

TickerCompanyWhy NowValuation Cue
SAP SAP Cloud migration tailwinds; lagged rebound vs. U.S. megacap tech. Four‑star‑type discount
RELX RELX Legal/risk analytics with oligopoly traits (LexisNexis) at a discount. Four‑star‑type discount
DEO Diageo Premium spirits leader investing to revive volumes; multiple compressed. Five‑star‑type discount

Actionable Playbook

  • Maintain market‑weight U.S. equities but rebalance within: add small caps and value; trim crowded defensives.
  • Favor cash‑rich, recurring revenue, pricing power—staples, med‑tech oligopolies, scaled platforms.
  • Be selective in cyclicals: Energy & targeted industrials at the right price; treat airlines with caution.
  • Add Europe deliberately to diversify factor and sector exposure.
  • Use fixed income for ballast; redeploy opportunistically on equity pullbacks.

Disclaimer: Educational only; not investment advice. Investing involves risk, including loss of principal. Assumptions herein are illustrative and may differ from third‑party methodologies. Verify figures before use.

© October 06, 2025 • Q4 Investing Infographics Report


The Great AI Melt-Up: FOMO, CapEx, and the Psychology of the 2025 Bull Market

Introduction: A Market That Refuses to Cool Off

Stocks at record highs. Bitcoin is at a record high. Gold at record highs.
If that sentence sounds familiar, it’s because investors have been living through one of the most relentless risk-on rallies in years. The NASDAQ has surged past 6,800, and now veteran strategist Ed Yardeni has raised his price target to 7,000, citing growing odds of a “melt-up” in equities.

He’s not alone. The sentiment across Wall Street feels unmistakably bullish. Portfolio managers are chasing performance into year-end, small caps are breaking out, and the calendar itself has become “the enemy of the bears.”

But under the optimism lies a deeper tension — the fear that this euphoric rally might be the final leg of a bull market before gravity inevitably returns.

So is this 1999 all over again? Or are we simply witnessing the early innings of a multi-year AI-powered expansion?

Let’s unpack what’s driving this melt-up — and what could eventually bring it to an end.


1. The Anatomy of a Melt-Up

A “melt-up” isn’t your ordinary rally. It’s an emotional stampede, where investors buy not because they believe valuations are cheap, but because they fear missing out on further gains.

Legendary trader Paul Tudor Jones captured the moment perfectly in a recent interview.

“It feels exactly like 1999,” he said. “I don’t know whether we’ll replay it exactly, but all the ingredients are in place. The NASDAQ doubled between October ’99 and March 2000 — and if it looks like a duck and quacks like a duck, it’s probably not a chicken.”

Translation: we might not be in a classic tech bubble yet, but the setup certainly rhymes.

From AI chips to data-center construction to software automation, nearly every sector with an “AI” prefix is being bid up. Hedge funds and retail traders alike are piling in, not wanting to be the ones who sold too early.

And yet, history tells us that the final stage of a bull market often delivers the strongest price appreciation. That’s what makes it so difficult — and so seductive.


2. The Psychology of FOMO and “Happy Feet” Investing

There’s a unique kind of anxiety that emerges when everything is going up — a blend of confidence and unease. One market commentator called it having “happy feet”: always ready to sprint out of the market, but never actually doing it.

This describes the psychology of 2025 perfectly. Investors know valuations are stretched. They know AI enthusiasm has run hot. But the alternative — missing out on the next leg higher — feels even worse.

Every dip is bought instantly. Every warning from a cautious analyst is drowned out by the hum of price momentum.

This is classic late-cycle behavior, where emotions override discipline. Yet it’s also understandable. The AI revolution is real — and unlike 1999, this time it’s not just pets.com and banner ads. It’s a global infrastructure build-out with trillions in capital expenditure behind it.


3. CapEx: The Engine Behind the Euphoria

If 2023 was the year AI models went mainstream, 2025 is the year the hardware arms race kicked into overdrive.

From Nvidia to AMD, TSMC to Micron, capital expenditures (CapEx) are soaring as companies race to meet demand for computing power.

According to Wells Fargo, this CapEx cycle is “one of the most robust in modern market history.” Data-center construction, semiconductor fabrication, and AI infrastructure investments are projected to grow at double-digit rates through 2027.

And the numbers are staggering:

AI Infrastructure Metric20232025 (Projected)Change
Global Data Center Demand (GW)82119+45%
Annual AI CapEx Spend (USD)$200B$350B+75%
GPU Shipments for AI Workloads3.5M6.8M+94%

Source: Goldman Sachs, Wells Fargo, IDC (2025 projections)

As one Goldman Sachs analyst put it, “As long as the CapEx music is playing, investors will keep dancing.”

And dance they have. AI-linked stocks continue to trade at sky-high multiples, fueled by the assumption that this massive spending cycle will remain durable for years.


4. The OpenAI Effect: Where the Money Flows

A surprising amount of this investment frenzy traces back to OpenAI, the company behind ChatGPT.

CEO Sam Altman’s firm has become the gravitational center of the AI economy. From Microsoft’s cloud build-out to Nvidia’s GPU supply, OpenAI’s hunger for computing power has set off a global supply chain sprint.

“We need as much computing power as we can get,” said OpenAI’s Greg Brockman.
AMD’s Lisa Su echoed: “AI compute is needed everywhere.”

The consensus is clear: demand is infinite — at least for now.

But where’s all this capital coming from? That’s the trillion-dollar question.

Venture funds, sovereign wealth funds, and private-market investors are funneling billions into AI infrastructure. Even debt markets are opening up to vendor-financed deals that look eerily similar to the telecom bubble of the late ’90s.

OpenAI itself is valued at $500 billion privately, with credible rumors suggesting a trillion-dollar IPO within the next two years. That figure alone would make it one of the largest public debuts in history, rivaling Saudi Aramco.

So yes, the money is real — but so are the expectations.


5. 1999 vs. 2025: Why This Time Might Be Different

It’s tempting to draw direct parallels between the current AI boom and the dot-com bubble. After all, both periods featured:

  • Explosive technology narratives
  • Valuation disconnects
  • Fear of missing out among retail and institutional investors

But there’s one crucial difference: capital intensity.

In 1999, starting an internet company required little more than a domain name and a dream. Today, building an AI company demands enormous computing power, data pipelines, and engineering talent. These are not speculative ventures; they are capital-heavy, infrastructure-driven businesses.

That doesn’t mean there won’t be losers — many smaller AI startups will vanish. But it does suggest that the current boom has more tangible assets behind it.

In other words, this isn’t about the sustainability of business models — it’s about the valuation of those models.

And as long as the CapEx flows, valuations can remain stretched for longer than skeptics expect.


6. The AI Monetization Question

Still, even bulls admit that AI monetization remains murky.

Yes, enterprises are adopting AI tools. Yes, efficiency gains are real. But where are the killer apps that translate into explosive revenue growth?

Investors are asking whether AI investments are producing tangible returns, or whether they’re merely expanding the cost base of the corporate world.

Some early signs are promising — productivity tools, customer service automation, drug discovery, and code generation are seeing adoption. But the broad ecosystem has yet to prove consistent cash flows.

As one portfolio manager put it,

“At some point, we’ll have built enough data center capacity. Then the question will be: is the demand actually there?”

That’s the inflection point markets will be watching as we move deeper into 2025.


7. The Goldilocks Paradox: Too Hot, Too Cold, or Just Right?

Another fascinating wrinkle is how everything is rallying — not just stocks.

Bitcoin, gold, and the NASDAQ are all at record highs simultaneously. Normally, these assets move in opposite directions. Bitcoin and gold are inflation hedges; equities thrive on economic growth.

So how can they all rise together?

The answer lies in liquidity. Global central banks, despite higher interest rates, have not meaningfully tightened the flow of money. Fiscal stimulus remains abundant. The global appetite for AI investment keeps liquidity in circulation, sustaining all risk assets at once.

It’s a perfect cocktail for a melt-up — until the music stops.


8. The Chase Is On: Portfolio Managers and the Calendar Effect

For institutional investors, the fear of underperformance is just as real as the fear of losses.

As the fourth quarter unfolds, fund managers who lagged behind the NASDAQ rally are now forced to “chase the tape.” Missing out on a year-end rally could mean explaining to clients why they underperformed an index that keeps making new highs.

That’s why the calendar becomes “the enemy of the bears.” Even those who believe the market is overheated feel compelled to participate.

It’s a professional form of FOMO — and it drives even more buying pressure into year-end.


9. The Circular Financing Risk

One under-discussed element of this AI boom is the rise of circular vendor financing.

Here’s how it works:

  • A big AI firm (say OpenAI or Anthropic) orders chips or data-center services from a supplier.
  • The supplier (like Nvidia or a cloud provider) extends financing or equity to the buyer.
  • Both parties recognize growth on paper, fueling higher valuations, which in turn justifies more financing.

This loop can be self-reinforcing — until someone breaks the chain. It’s reminiscent of the late-stage credit practices that inflated the telecom and housing bubbles.

Right now, few investors are worried. But as spending scales into the trillions, counterparty risk and balance-sheet transparency will become critical watchpoints.


10. The Bear Case: When Does the Music Stop?

Every melt-up ends the same way — with exhaustion.

Here are three key signals to watch for when momentum starts to wane:

  1. Earnings Divergence: If AI-heavy companies start reporting slower revenue growth or margin pressure despite record CapEx, the narrative could fracture.
  2. Policy Shift: If central banks begin withdrawing liquidity faster than expected, asset valuations could quickly compress.
  3. Sentiment Peak: When “joy of missing out” (JOMO) finally overtakes FOMO — that’s when the top is likely near.

For now, none of these indicators is flashing red. But history suggests that melt-ups can turn to meltdowns quickly — often when optimism seems most universal.


11. The Bull Case: AI as the New Electricity

The optimists argue that comparing 2025 to 1999 is unfair. The AI boom, they say, is more akin to the electrification of the 20th century than the internet mania of the late 1990s.

Electricity took decades to transform productivity. AI might follow a similar curve, beginning with infrastructure spending and culminating in broad economic gains.

Under this view, today’s high valuations reflect future potential — not irrational exuberance. As long as companies like Microsoft, Nvidia, Amazon, and Google continue reinvesting profits into AI infrastructure, the foundation remains strong.

If the AI revolution truly reshapes labor productivity, GDP, and innovation, we could still be in the early innings, not the final blow-off phase.


12. Risk Management in a Melt-Up

For individual investors, the key challenge is psychological discipline.

You can’t time the top, but you can manage exposure. Here are three strategies worth considering:

  • Trim, Don’t Exit: Reduce oversized positions rather than selling entirely.
  • Diversify Across Cycles: Balance high-beta tech holdings with defensive sectors like healthcare, utilities, and dividend aristocrats.
  • Stay Tactical: Use trailing stops and dynamic asset allocation rather than all-or-nothing bets.

Remember: melt-ups reward participation — but punish complacency.


13. What Comes Next

We’re witnessing the intersection of three powerful forces:

  1. Technological Revolution — AI is real, transformative, and capital-intensive.
  2. Psychological Euphoria — Investors are trapped between greed and fear.
  3. Financial Engineering — Cheap capital, vendor financing, and liquidity fuel the cycle.

Eventually, one of these pillars will crack. Maybe it’s a CapEx slowdown, maybe it’s regulatory risk, or maybe it’s investor fatigue. But until that moment arrives, the path of least resistance remains up.

As Ed Yardeni put it, the odds of another melt-up are now 30% — up from 25% just weeks ago.

That might not sound huge, but when combined with institutional FOMO and AI-driven optimism, it’s more than enough to keep this rally alive through the end of the year.


Conclusion: Riding the Wave, Not Drowning in It

Markets, like human behavior, move in cycles of emotion. Today’s phase — the melt-up — is defined by confidence, disbelief, and a growing sense of inevitability.

Investors don’t buy because they see value; they buy because everyone else is buying. And as long as the CapEx music keeps playing, as long as AI remains the holy grail of innovation, the crowd will keep dancing.

The trick, as always, is to stay near the exit without leaving the party too soon.

Whether this turns out to be 1999 redux or 2030’s beginning, one thing is certain — this era will be remembered as the moment when AI met Wall Street, and both decided they couldn’t stop building.


Key Takeaways

  • The 2025 market rally is being driven by AI optimism, CapEx expansion, and investor FOMO.
  • Unlike 1999, today’s AI cycle is capital-intensive and infrastructure-driven.
  • Risks include circular financing, valuation excess, and lack of near-term monetization.
  • The melt-up can continue as long as liquidity and CapEx remain strong.
  • Disciplined participation — not blind enthusiasm — is the smartest play.

Disclaimer

This article is for informational purposes only and should not be considered financial advice. Investing in equities involves risk, including possible loss of principal. Always conduct your own due diligence or consult a qualified financial advisor before making investment decisions.


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