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# How Many ETFs Should You Own?
- URL: https://www.yourmoneymate.co.uk/how-many-etfs-should-i-own/
- Published: 2026-03-12T15:27:33.000Z
- Updated: 2026-03-12T15:27:33.000Z
- Description: Most investors think owning more ETFs means better diversification but that’s often wrong. In this guide, we break down how many ETFs you actually need, why ETF overlap is a hidden risk, and how UK investors can build a simple 2–3 ETF portfolio that is truly diversified.
- Author: Ash Davidson
- Tags: ETFs, Beginner Investing

If you own five, six, or even ten ETFs, there’s a very good chance you’re actually **owning the same companies multiple times** without realising it.

This article explains:

- How many ETFs most investors actually need
- Why owning too many ETFs can create **hidden concentration risk**
- A simple ETF portfolio structure many UK investors use
- How to spot **ETF overlap in your portfolio**

Before we begin, ask yourself this question:

**How many ETFs do you currently own and do you actually know how diversified you are?**

### The Simple Answer: Most Investors Only Need 2–3 ETFs

For most long-term investors, **two or three ETFs is usually enough**.

That might sound surprising in a world where influencers constantly recommend buying multiple funds.

But diversification doesn’t come from the **number of ETFs** you own.

It comes from **what those ETFs actually hold**.

Many funds track very similar indexes and therefore hold the same companies.

For example:

- Global ETFs
- S&P 500 ETFs
- NASDAQ ETFs

These often contain the **same large technology companies** such as:

- Apple
- Microsoft
- Nvidia
- Amazon
- Alphabet

So even if you own multiple ETFs, your portfolio may still be heavily concentrated in a handful of companies.

![](https://storage.ghost.io/c/0f/b7/0fb754a9-0f62-425e-aeb8-a0174d2edaa6/content/images/2026/03/Screenshot---2026-03-12T150431.628.png)

ETF Screener showcasing how the popular 3 have huge overlap.

## Strategy 1: The One ETF Portfolio

The simplest strategy is owning **one global ETF**.

Many investors choose a **global index fund** that tracks developed and emerging markets.

Examples typically track indexes like:

- MSCI ACWI
- FTSE All-World

These funds already contain **thousands of companies worldwide**.

A typical global ETF might include:

- United States (largest weighting)
- Europe
- Japan
- United Kingdom
- Emerging markets such as China or India

For beginners, this approach can be extremely effective.

One ETF gives you:

- Global diversification
- Low costs
- Simple portfolio management

It’s not lazy.

It’s efficient.

And historically, global index funds have delivered strong long-term results compared with leaving money in cash or savings accounts.

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## Strategy 2: The 2–3 ETF Portfolio (Core + Tilt)

Many investors prefer adding **one or two additional ETFs** alongside a global fund.

This creates a **core and satellite strategy**.

The idea is simple.

Your main holding covers the entire market, while smaller allocations add specific exposure.

### Step 1: Your Core ETF

Typically **70–90% of your portfolio**.

This is usually a **global ETF** covering developed and emerging markets.

This keeps your portfolio diversified and stable.

### Step 2: Add a Tilt (Optional)

Your second ETF may target a specific investment theme.

Common tilts include:

**Technology / Growth**

Some investors add an ETF tracking:

- NASDAQ
- S&P 500

These provide heavier exposure to major US technology companies.

However, remember:

Global ETFs already contain many of these stocks.

So adding another US-focused ETF increases your exposure significantly.

**Income / Dividend ETFs**

Income ETFs focus on companies that pay strong dividends.

These can appeal to investors looking to generate income over time.

Dividend funds often include sectors like:

- Financials
- Energy
- Consumer staples

They may also have **different holdings than growth-focused funds**, which can improve diversification.

**Home Bias ETFs**

Some investors like adding exposure to their domestic market.

For UK investors this might include:

- FTSE 100 ETFs
- UK dividend ETFs

This can increase exposure to companies and currencies closer to home.

### Why Too Many ETFs Can Be a Problem

Many portfolios look diversified on the surface.

But when you examine the holdings, you often see something like this:

- Global ETF
- S&P 500 ETF
- NASDAQ ETF

At first glance that seems balanced. But the reality is different.

Those three funds can easily lead to **90%+ exposure to the United States**.

Even worse, the **top 10 companies** may dominate all three funds.

For example:

| Company   | Appears In                 |
| --------- | -------------------------- |
| Apple     | All World, S&P 500, NASDAQ |
| Microsoft | All three                  |
| Nvidia    | All three                  |
| Amazon    | All three                  |

So your portfolio might appear diversified across multiple ETFs, but actually be **heavily concentrated in the same stocks**.

This is known as **ETF overlap**.

![A person holding a business card in front of a computer screen](https://images.unsplash.com/photo-1723587693188-52754b315b50?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wxMTc3M3wwfDF8c2VhcmNofDE1fHx0ZWNoJTIwc3RvY2tzfGVufDB8fHx8MTc3MzMyODU0OXww&ixlib=rb-4.1.0&q=80&w=2000)

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## ETF Overlap Explained

ETF overlap happens when multiple funds hold the **same companies**.

The result is hidden concentration.

For example:

If three ETFs each allocate 8–10% to Apple, your combined exposure could be far higher than you realise.

This increases risk because:

- A small number of companies drive portfolio performance
- Market downturns in one sector impact multiple ETFs at once
- Diversification becomes an illusion

That’s why **understanding ETF holdings is critical**.

### When Owning More Than Three ETFs Makes Sense

There are situations where holding more ETFs can be reasonable. This usually happens when investors want **very specific exposures**.

Examples include:

- Small-cap ETFs
- Emerging markets ETFs
- Sector ETFs (AI, energy, healthcare)
- Commodity ETFs
- Thematic investing

But these allocations are usually **small percentages of a portfolio**.

For example:

- 80% core global ETF
- 10% dividend ETF
- 5% small-cap ETF
- 5% thematic exposure

The key difference is **intentional allocation**, not random diversification.

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## Example of a Simple ETF Portfolio Structure

A simple portfolio could look like:

| Allocation | ETF Type              |
| ---------- | --------------------- |
| 70–90%     | Global All-World ETF  |
| 10–20%     | Dividend / Income ETF |
| Optional   | Home market ETF       |

This keeps the portfolio:

- Easy to manage
- Diversified globally
- Focused on long-term growth

Most importantly, it avoids unnecessary overlap.

### Diversification Isn't About Quantity

Many investors fall into the trap of thinking more ETFs equals more diversification.

But diversification comes from **exposure to different companies, sectors and regions** not simply owning more funds.

Sometimes the simplest portfolios perform the best.

Because they are easier to understand and easier to stick with.

### The Most Important Investing Principle

At the end of the day, building wealth through investing is rarely about complexity.

It’s about **time in the market**.

You don’t need ten ETFs.

You need:

- A solid investment strategy
- Consistent contributions
- Long-term patience

Twenty years in a well-constructed portfolio often matters far more than constantly tweaking your investments.

### Tools to Analyse Your ETF Portfolio

If you want to understand your portfolio better, tools can help you analyse:

- ETF overlap
- Country exposure
- Sector allocation
- Top holdings

You can also simulate portfolios to see how diversified they really are.

👉 You can explore tools like the [**ETF Screener**](https://www.yourmoneymate.co.uk/etf-screener/)

They allow you to:

- Research ETFs
- Analyse holdings
- Understand diversification risks

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