IWDA vs SPY: how much do they overlap?
iShares Core MSCI World UCITS ETF (USD Acc) (IWDA) · SPDR S&P 500 ETF Trust (SPY)
IWDA and SPY overlap by 68.7% by portfolio weight. In practical terms, about 31.3% of the smaller-weighted exposure is different between the two funds. They share 446 stocks; the largest shared position is Nvidia Corp (NVDA), contributing 5.31% to the overlap.
overlap by weight · 446 shared holdings
IWDA: 1224 holdings (as of 2026-08-04) · SPY: 504 holdings (as of 2026-08-05)
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 2026-08-05.
Note: the two funds' latest official filings have different dates, which can understate overlap slightly for funds tracking similar indexes.
Moderate overlap
What this means
IWDA and SPY share a meaningful slice of holdings. They are related but not interchangeable; check the shared names below to see where your exposure doubles up.
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 IWDA | in SPY |
|---|---|---|---|
| Nvidia Corp | NVDA | 5.31% | 7.99% |
| Apple Inc | AAPL | 4.93% | 6.87% |
| Microsoft | MSFT | 3.77% | 5.45% |
| Amazon.Com Inc | AMZN | 2.91% | 4.02% |
| Alphabet Class A | GOOGL | 2.38% | 3.2% |
| Broadcom Inc | AVGO | 2.04% | 2.98% |
| Alphabet Class C | GOOG | 1.88% | 2.56% |
| Meta Platforms Class A | META | 1.4% | 1.95% |
| Micron Technology | MU | 1.09% | 1.52% |
| Jpmorgan Chase & Co | JPM | 1.04% | 1.45% |
FAQ
How much do IWDA and SPY overlap?
IWDA and SPY have a 68.7% overlap by weight, sharing 446 holdings (out of 1224 in IWDA and 504 in SPY), based on official issuer holdings as of 2026-08-04.
What does 68.7% overlap mean?
IWDA and SPY share a meaningful slice of holdings. They are related but not interchangeable; check the shared names below to see where your exposure doubles up.
Which stocks do IWDA and SPY 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.