STOP Using MSCI World! Here’s Why It’s Costing You Money

Why You Should Stop Using the MSCI World Index for Your Accumulation Plan

If you’re investing through an ETF-based accumulation strategy, chances are you’re relying on the MSCI World Index. After all, it’s one of the most commonly recommended benchmarks for those seeking broad global diversification. But what if this “safe and diversified” approach isn’t actually the most efficient route to building long-term wealth?

Let’s explore why it might be time to move away from the MSCI World and how choosing a different index like the S&P 500 or the Nasdaq 100 could significantly boost your returns over the years.

The Hidden Concentration in MSCI World

The MSCI World Index is often described as a globally diversified index, but the reality is more nuanced. A closer look at its geographical breakdown reveals this:

• United States: 71%

• Japan: 5%

• United Kingdom: 3%

• Canada: 3%

• France: just under 3%

• Other countries: 13%

These “other” countries include Austria, Belgium, Denmark, Finland, Germany, Ireland, Italy, the Netherlands, Norway, Spain, Sweden, Switzerland, and Portugal.

So, while the index is technically global, it’s overwhelmingly dominated by the U.S. market. And here’s the irony: if you’re going to have such a large portion in U.S. stocks anyway, why not go all in on the best performers within that market?

MSCI World vs. S&P 500: The Performance Gap

Let’s look at hard numbers. Using 30-year historical seasonality data from the Forecaster platform:

• MSCI World: average annual return of 7.7%

• S&P 500: average annual return of 10.4%

At first glance, the difference might not seem dramatic. But compound interest tells a very different story.

Hypothetical Scenario:

• Initial capital: €1,000

• Monthly contribution: €1,000

• Duration: 20 years

• Total invested: €240,000

Results with MSCI World (7.7% return):
Final value: ~€572,000
Profit: ~€331,000

Results with S&P 500 (10.4% return):
Final value: ~€807,000
Profit: ~€566,000

That’s a €235,000 difference with the same invested capital. This is the power of a few percentage points compounded over time.

The Diversification Myth

A common argument in favor of the MSCI World is its diversification, but is that really valid?

First, the S&P 500 itself, as shown by the Forecaster, includes 500 companies across all sectors, making it well-diversified in terms of industries. And although it’s made up of U.S.-listed companies, these are mostly global multinationals: think Apple, Microsoft, Amazon, and Meta, businesses operating across every continent.

Secondly, the so-called “diversified” 13% slice of MSCI World includes stock markets like Ireland, Portugal, Austria, and Belgium. Realistically, when have these markets outperformed the U.S.? The answer: almost never.

Even major European companies are opting to list on U.S. exchanges. A notable example is Birkenstock, the German sandal manufacturer, it chose to go public on the NYSE, not a European exchange. The reason? More capital, more visibility, more liquidity. It’s a clear vote of confidence in U.S. financial markets.

So, allocating 13% of your portfolio to underperforming, low-growth markets simply for the sake of “diversification” doesn’t hold up under scrutiny.

Taking It Further: Why I Prefer the Nasdaq 100

If you’re willing to accept a bit more volatility in exchange for potentially explosive returns, the Nasdaq 100 might be the answer. Often labeled a tech index, the Nasdaq is actually more diversified than you’d expect:

• 42% technology

• The rest spans consumer services, healthcare, industrials, and more.

What sets the Nasdaq apart is its focus on just 100 of the top-performing companies, which naturally skews it toward high-growth, innovative businesses.

The Numbers Don’t Lie:

• Nasdaq 100 average annual return (last 30 years): 19.2%

Let’s plug that into the same 20-year accumulation scenario:

• Monthly: €1,000

• Duration: 20 years

• Rate: 19.2%

• Total invested: €240,000

Final value: ~€2.8 million
Profit: ~€2.56 million

Compared to €566,000 with the S&P 500 and just €331,000 with the MSCI World, the Nasdaq 100 has delivered massively superior results at the cost of higher volatility.

What Should You Do?

The takeaway is simple: historical data shows that broader doesn’t always mean better. While the MSCI World Index sounds like a safe, diversified bet, in practice it waters down your potential returns by exposing you to slower-growth regions and markets.

Here’s a summary of what each option has offered over the past 30 years:

If your goal is long-term capital appreciation through a consistent accumulation plan, then sticking with the S&P 500 or even the Nasdaq 100 might be the smarter move, despite their narrower geographic scope. Remember, you’re still investing in global businesses, just through the most efficient and dynamic markets.

Of course, no historical data can guarantee future performance. However, understanding where we are truly investing and which markets have historically generated the most value is essential for making informed decisions. And right now, America, with its multinational companies, remains the beating heart of global innovation and growth.

So next time someone tells you that you must be globally diversified with the MSCI World, ask them this: Are you investing for appearances or for performance?