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MSCI World vs S&P 500

IWDADeveloped-world stocksvsCSPXThe biggest 500 US companies
The short answer
  • CSPX is 100% US; IWDA spreads across 23 developed countries (still about 70% US).
  • IWDA gives built-in country diversification in a single fund.
  • CSPX is a purer US bet with more concentration.
Performance
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Shown in USD. Past performance is not a reliable guide to future results.

MetricIWDACSPX
Annual fee (TER)
0.20%
0.07%
Tracks
MSCI World
S&P 500
Distribution
Accumulating
Accumulating
Domicile
Ireland Β· UCITS
Ireland Β· UCITS
Risk
Medium (3/5)
Medium (3/5)
Trades in
LSE (USD)
LSE (USD)
Provider
iShares
iShares
Developed-world stocksIWDA
Tracks MSCI World

One fund that owns about 1,500 large companies across 23 wealthy countries: the US, Europe, Japan, Australia and others. The US still dominates at roughly 70% of the fund because American companies are by far the most valuable. A solid 'one and done' core for a long-term portfolio.

See full IWDA details β†’
The biggest 500 US companiesCSPX
Tracks S&P 500

When people talk about 'the US stock market', this is basically what they mean. You own tiny slices of the 500 biggest US companies: Apple, Microsoft, Nvidia, Google, Amazon. Around a quarter of your money goes to the top 10 names alone, so the fund leans heavily into US tech.

See full CSPX details β†’
Tax notes for non-US investors

Both IWDA and CSPXare Irish-domiciled UCITS ETFs, so dividends from their US holdings are taxed at 15% under Ireland's US treaty, rather than the 30% that applies to US-domiciled funds for many non-US investors, and they sit outside US estate tax. Your own local tax still depends on where you live, so check your country's rules; for most investors the main ongoing cost to watch is each fund's annual fee.

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Frequently asked questions

Which is cheaper, IWDA.L or CSPX.L?

CSPX.L is cheaper. IWDA.L charges 0.20% per year and CSPX.L charges 0.07%. Both are inexpensive index funds, but a lower fee compounds in your favour over the long run.

Are IWDA.L and CSPX.L accumulating or distributing?

IWDA.L is accumulating, so dividends are reinvested automatically inside the fund. CSPX.L is accumulating, so dividends are reinvested automatically inside the fund. Accumulating funds suit investors who want hands-off compounding with no cash dividends to reinvest manually.

Are IWDA.L and CSPX.L both UCITS ETFs?

Yes, both are UCITS ETFs (IWDA.L domiciled in Ireland, CSPX.L in Ireland), so both give non-US investors the 15% US dividend withholding rate and sit outside US estate tax, unlike US-domiciled ETFs.

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