CSPX vs IWDA: how much do they overlap?
iShares Core S&P 500 UCITS ETF (USD Acc) (CSPX) · iShares Core MSCI World UCITS ETF (USD Acc) (IWDA)
CSPX and IWDA overlap by 70.3% by portfolio weight. In practical terms, about 29.7% of the smaller-weighted exposure is different between the two funds. They share 450 stocks; the largest shared position is Nvidia Corp (NVDA), contributing 5.31% to the overlap.
overlap by weight · 450 shared holdings
CSPX: 503 holdings (as of 2026-08-04) · IWDA: 1224 holdings (as of 2026-08-04)
Holdings dates reflect the latest official files available for each issuer. Some issuers publish daily files; others are represented by periodic SEC filings. Analysis template updated 2026-08-04.
High overlap
What this means
CSPX and IWDA are largely the same portfolio. Holding both adds little diversification — most dollars end up in the same underlying stocks.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in CSPX | in IWDA |
|---|---|---|---|
| Nvidia Corp | NVDA | 7.7% | 5.31% |
| Apple Inc | AAPL | 6.82% | 4.93% |
| Microsoft | MSFT | 5.49% | 3.77% |
| Amazon.Com Inc | AMZN | 4.08% | 2.91% |
| Alphabet Class A | GOOGL | 3.32% | 2.38% |
| Broadcom Inc | AVGO | 2.97% | 2.04% |
| Alphabet Class C | GOOG | 2.66% | 1.88% |
| Meta Platforms Class A | META | 1.94% | 1.4% |
| Micron Technology | MU | 1.51% | 1.09% |
| Jpmorgan Chase & Co | JPM | 1.44% | 1.04% |
FAQ
How much do CSPX and IWDA overlap?
CSPX and IWDA have a 70.3% overlap by weight, sharing 450 holdings (out of 503 in CSPX and 1224 in IWDA), based on official issuer holdings as of 2026-08-04.
What does 70.3% overlap mean?
CSPX and IWDA are largely the same portfolio. Holding both adds little diversification — most dollars end up in the same underlying stocks.
Which stocks do CSPX and IWDA both hold?
The largest shared positions are Nvidia Corp, Apple Inc, Microsoft, Amazon.Com Inc, Alphabet Class A. The full list of top shared holdings with weights in each fund is shown on this page.