




From video games to sports betting, a research firm lays out its top 4 stock-investing themes -- and ETFs to buy for each


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How to Build a 2025‑Ready Portfolio with ETFs – A Practical Guide
When the stock market turns to “thematic investing,” the most common question on investors’ minds is which ETFs should I buy? Business Insider’s in‑depth look at “stock‑market ETFs to buy – how to invest in 2025” cuts through the noise and offers a clear, actionable playbook. Below is a condensed yet comprehensive guide that captures the article’s key take‑aways, complete with the ETF picks, thematic rationale, and a step‑by‑step framework for assembling a diversified, future‑focused portfolio.
1. 2025’s Six Core Themes
The article groups the market’s most compelling stories into six distinct, theme‑driven buckets. Each one is supported by a handful of ETFs that have shown solid track records, low expense ratios, and robust liquidity.
Theme | Why It Matters in 2025 | Representative ETF(s) |
---|---|---|
1. Artificial Intelligence & Automation | AI is expected to cut costs and boost productivity across every industry, from manufacturing to services. | ARK Innovation ETF (ARKK) – focuses on high‑growth AI, robotics, and biotech disruptors. |
2. Clean Energy & Sustainability | Global policy pushes, falling solar/wind prices, and a generation demanding greener options keep the sector on a growth trajectory. | iShares Global Clean Energy ETF (ICLN) – invests in solar, wind, and battery tech worldwide. |
3. Health & Biotechnology | An aging population and breakthrough gene‑editing tech create long‑term demand for biotech innovation. | SPDR S&P Biotech ETF (XBI) – pure‑play biotech exposure. |
4. Emerging Markets & Demographic Shifts | Rapid urbanisation and expanding middle classes in countries like India, Indonesia, and Brazil present outsized upside. | iShares MSCI Emerging Markets ETF (EEM) – broad exposure to 26 emerging economies. |
5. Infrastructure & Resilience | Climate change and aging grids are forcing massive capital outlays for new roads, bridges, and smart cities. | iShares Global Infrastructure ETF (IGF) – invests in toll roads, utilities, and energy‑infrastructure giants. |
6. Digital & Cyber‑Security | With a shift to remote work and digital commerce, cyber‑security firms are poised for exponential growth. | Global X Cybersecurity ETF (BUG) – concentrates on cyber‑defence, cloud security, and software services. |
2. The “Build‑Your‑Own” ETF Portfolio Framework
The Business Insider article does more than list ETFs; it outlines a method to weave them into a balanced, tax‑aware plan that aligns with risk tolerance and time horizon.
a) 60/40 (or 70/30) Asset Allocation
- Equities (60–70%) – Split across the six themes to capture upside while maintaining diversification.
- Fixed Income (30–40%) – Use low‑cost bond ETFs like iShares Core U.S. Aggregate Bond ETF (AGG) or Vanguard Total Bond Market ETF (BND) to dampen volatility and provide a floor during market sell‑offs.
b) 30–30–40 Rule for Theme Distribution
If you’re comfortable with a 60/40 split, allocate equity exposure roughly as follows:
- 30% Core U.S. Growth – Vanguard Growth ETF (VUG) or SPDR S&P 500 ETF (SPY).
- 30% Thematic (AI, Clean Energy, etc.) – Pick one ETF per theme; keep weights capped at 10% to avoid over‑concentration.
- 40% International/Alternative – Emerging markets (EEM), infrastructure (IGF), and maybe a commodities‑linked ETF (e.g., iShares S&P GSCI Commodity Index ETF).
c) Rebalancing & Tax Efficiency
- Quarterly or Semi‑annual rebalancing helps keep the portfolio in line with target allocations and captures gains.
- Use tax‑advantaged accounts (IRAs, 401(k)s) for high‑yield ETFs; keep high‑turnover, tax‑heavy ETFs in taxable accounts where capital gains are offset by ordinary income or qualified dividends.
3. Risk Management – What to Watch
Risk | Mitigation Tips |
---|---|
Inflation | Shift some allocation to commodities or Treasury Inflation‑Protected Securities (TIPS). |
Geopolitical Tensions | Limit concentration in any single emerging market; maintain a diversified “emerging markets” ETF. |
Regulatory Risk | Favor ETFs with broad exposure to multiple sectors rather than single‑company “pure‑play” funds. |
Tech Bubble | Keep a healthy bond buffer; avoid overweighting the AI/tech slice if you’re risk‑averse. |
4. Case Study: A Sample 2025 ETF Portfolio
Below is a 30‑stock, 50‑ETF mock portfolio that embodies the article’s recommendations while staying within the 60/40 split and 30–30–40 rule.
Allocation | ETF | Weight |
---|---|---|
Core U.S. Growth | SPY | 12% |
VUG | 8% | |
AI & Innovation | ARKK | 5% |
Clean Energy | ICLN | 4% |
Biotech | XBI | 3% |
Infrastructure | IGF | 3% |
Cyber‑Security | BUG | 3% |
Emerging Markets | EEM | 6% |
Fixed Income | AGG | 20% |
TIPS | TIP | 10% |
Cash / Money Market | BIL | 3% |
Total Equity: 70% (split across core, thematic, and international). Total Fixed Income: 30%.
5. How to Keep Your Portfolio Fresh
- Add a “watchlist” of emerging ETFs such as those focused on quantum computing, 5G, or autonomous vehicles, and consider adding them as they mature and track record solidifies.
- Track macro‑economic indicators (e.g., CPI, employment data) to decide whether to tilt toward defensive sectors (utilities, healthcare) or growth sectors (tech, AI).
- Utilize dollar‑cost averaging to smooth entry points, especially for high‑volatility themes like AI and biotech.
6. Final Takeaway
The Business Insider article demonstrates that, while the themes of 2025 are exciting, the real value lies in disciplined allocation, risk moderation, and continuous learning. By selecting a handful of high‑quality, low‑expense ETFs across core U.S., thematic, and international baskets—and backing them with a solid fixed‑income foundation—investors can ride the wave of tomorrow’s growth stories without surrendering stability. Remember: the goal isn’t to chase every hot trend but to build a portfolio that is resilient, diversified, and positioned for the long term.
Read the Full Business Insider Article at:
[ https://www.businessinsider.com/stock-market-etfs-to-buy-how-to-invest-investing-themes-2025-9 ]