AI Boom or Bubble? How to Safeguard Your Portfolio as Tech Valuations Surge

Artificial intelligence stocks have delivered spectacular returns in 2025, with companies like Nvidia (NVDA) reporting blockbuster earnings and AI-linked tech names dominating market gains. But behind the rally, concern is building that the sector may be overheating—and possibly heading into bubble territory.

According to an Investor’s Business Daily analysis, the 70 stocks inside the Global X Artificial Intelligence & Technology ETF (AIQ) have collectively lost $2.4 trillion in market value since Oct. 29, raising questions about how durable the AI boom really is.

These fears are echoed in the November 2025 Bank of America Global Fund Manager Survey, where 45% of respondents said an AI equity bubble is the biggest current market risk, and more than half believe AI stocks have already entered bubble territory.

So, are we reliving a modern version of the dot-com boom and bust? And more importantly—how can investors protect their portfolios if AI stocks suddenly reverse course?

Is the AI Rally a Bubble? Analysts Split

**Why Some Experts Say This Is Not a Bubble**

Carolyn Barnette, head of market and portfolio insights at BlackRock, argues that today’s environment looks nothing like the speculative frenzy of the late 1990s.

She notes that:

AI investment today is backed by real earnings and cash flow
Major tech players maintain strong balance sheets
Capital spending is self-funded, not debt-driven

Barnette emphasizes that unlike the dot-com era—when stock prices far outpaced profits—today’s AI leaders generate steady cash and allocate capital responsibly, making the sector more resilient to rising interest rates.

Why Others Insist a Bubble Is Inflating

Torsten Sløk, chief economist at Apollo Global Management, strongly disagrees. His analysis shows:

The top 10 companies in the S&P 500 are more overvalued today than during the 1990s tech bubble
AI valuations were inflated by years of near-zero interest rates
Rising rates and persistent inflation will be major headwinds for tech and growth stocks

Sløk argues that the AI sector’s surge was fueled by easy money—and that environment is gone.

With inflation pressures from tariffs, deglobalization, and demographics, he expects interest rates to stay higher for longer, making it difficult for tech to maintain extreme valuations.

How to Protect Your Portfolio If AI Stocks Stumble

Since experts disagree on whether a bubble exists, investors may be wise to prepare for either scenario—continued expansion or a painful correction. Here’s how to shore up your portfolio.

1. Focus on AI Adopters—Not Just AI Creators

Kevin Gordon, senior investment strategist at Schwab, says investors should differentiate between:

AI creators (companies building AI models, chips, hardware)
AI adopters (industries using AI to boost efficiency and reduce costs)

He believes the next major investment cycle will favor AI adopters—companies that benefit from AI innovation without needing to spend heavily to create the technology themselves.

Diversifying into AI beneficiaries could help balance risk.

2. Reevaluate Your Goals, Time Horizon, and Risk Tolerance

Gordon also urges investors to check whether their portfolios still match their life goals:

How soon will you need your investment funds?
Are your holdings appropriate for that timeline?
Has your risk appetite changed?

In periods of rapid market change, realigning your portfolio with your long-term plan is essential.

3. Add Strategic Diversifiers: Global Equities, Bonds, and Gold

UBS recommends several tactics for reducing exposure to an AI-heavy U.S. market:

• Asian Tech & Japanese Equities

UBS highlights opportunities in China’s tech sector and Japanese markets. Beijing’s push for tech independence and innovation could support ongoing gains.

• High-Quality Bonds

Quality bonds often rally during economic uncertainty or when enthusiasm for high-growth sectors fades. With yields still attractive, UBS sees a compelling risk-return profile.