ETF Overlap Checker
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ETF Overlap Checker

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IEMG vs IWR Overlap

Both funds come from IShares. IEMG is an emerging-markets equity ETF, while IWR is a mid-cap U.S. equity ETF. IEMG and IWR show limited overlap, with an estimated weighted overlap of 3.49%. They share 3 holdings in the loaded dataset, led by 066922519, GB00BRXH2664, and 066922477.

3.5% overlap
#
3Shared Holdings
OK
Low Overlap

Freshly computed.

Quick Answer

Both funds come from IShares. IEMG is an emerging-markets equity ETF, while IWR is a mid-cap U.S. equity ETF. IEMG and IWR show limited overlap, with an estimated weighted overlap of 3.49%. They share 3 holdings in the loaded dataset, led by 066922519, GB00BRXH2664, and 066922477.

  • 3.49% weighted overlap across 3 shared holdings.
  • The top three shared holdings explain 100.11% of the measured overlap.
  • IEMG and IWR are closer in breadth than a broad-vs-niche ETF pair.
  • The overlap is mostly explained by the top shared positions rather than sector labels alone.
  • Holding both can still add materially different exposure.

Data Freshness

IEMG holdings
Aug 12, 2026
IWR holdings
Aug 13, 2026
Overlap computed
Aug 13, 2026
Data source
Financial Modeling Prep

Review the methodology for the overlap formula and refresh policy.

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About These ETFs

ETF A

IEMG

iShares Core MSCI Emerging Markets ETF

Issuer
IShares
Asset class
Equity
Expense ratio
0.09%
AUM
$156B
Inception
Oct 17, 2012

ETF B

IWR

iShares Russell Mid-Cap ETF

Issuer
IShares
Asset class
Equity
Expense ratio
0.18%
AUM
$58B
Inception
Jul 17, 2001

What Stands Out In This Comparison

01

What This Means

Both funds come from IShares. IEMG is an emerging-markets equity ETF, while IWR is a mid-cap U.S. equity ETF. IEMG and IWR do not own much of the same portfolio weight. That usually means you are combining different parts of the market, with only a small amount of duplication through names like 066922519, GB00BRXH2664, and 066922477.

02

How They Differ

Both funds come from IShares. IEMG is an emerging-markets equity ETF, while IWR is a mid-cap U.S. equity ETF. Neither fund clearly dominates on breadth, so the practical difference is more about weighting, index construction, and cost. IEMG has the lower expense ratio, while IWR charges more for its exposure.

03

What Drives The Overlap

The overlap is driven by a relatively small set of large shared positions. The top three shared holdings account for 100.11% of the score, which means the result is heavily influenced by the biggest common weights rather than a long tail of tiny positions.

04

When One May Fit Better

Because IEMG and IWR are closer in breadth, the better fit usually comes down to index methodology, issuer preference, and cost. IEMG has the lower expense ratio, while IWR charges more for its exposure.

Overlap Driver Snapshot

Concentration

The top three shared holdings explain 100.11% of the full overlap score.

That helps show whether the score comes from a handful of giant shared positions or from a broader mix of common holdings.

Shared Sector Tilt

Sector tags are not consistently available for the biggest shared positions in this dataset, so this comparison leans more on the specific holdings than on sector labels.

Top Shared Holdings

These are the holdings contributing the most to the overlap score between IEMG and IWR.

HoldingNameIEMG Wt.IWR Wt.Overlap
066922519BlackRock Funds III: BlackRock Cash Funds: Institutional; SL Agency Shares5.31%2.98%2.98%
GB00BRXH2664ANGLOGOLD ASHANTI PLC0.33%0.39%0.33%
066922477BlackRock Funds III: BlackRock Cash Funds: Treasury; SL Agency Shares0.45%0.18%0.18%

Why These ETFs Overlap

Both funds come from IShares. IEMG is an emerging-markets equity ETF, while IWR is a mid-cap U.S. equity ETF. The overlap exists because both funds allocate meaningful weight to the same holdings. In this dataset, the biggest shared drivers are 066922519, GB00BRXH2664, and 066922477, which appear in both portfolios and push the overlap score higher.

Holding both IEMG and IWR can make sense if you want exposure to different sleeves of the market. The overlap is small enough that both funds may still improve diversification.

Related Comparisons

AGG vs IEMG->AGG vs IWR->BND vs IEMG->BND vs IWR->

Frequently Asked Questions About IEMG and IWR

What is the overlap between IEMG and IWR?+
IEMG and IWR currently show an estimated weighted overlap of 3.49% based on the loaded holdings data.
How many holdings do IEMG and IWR share?+
They share 3 holdings in the current dataset.
Is the IEMG and IWR overlap high?+
The current verdict is Low Overlap. That means the two ETFs have limited duplication in portfolio weight.
Why do IEMG and IWR overlap?+
IEMG and IWR overlap because the same large positions appear in both funds. In this comparison, the top three shared holdings explain 100.11% of the measured overlap score.
Which ETF is broader, IEMG or IWR?+
IEMG and IWR look closer in breadth than a broad-vs-niche pair, so the main difference is more about strategy and weighting than simple market coverage.

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How Overlap Is Calculated

A straightforward approach used by portfolio analysts.

Overlap = sum(min(Weight_A, Weight_B)) for each shared holding

For every stock that appears in both ETFs, we take the smaller of the two weights. Adding up all those minimums gives the total overlap percentage. A score of 100% means the two ETFs hold the exact same stocks in the same proportions.

Want the full explanation? Read the methodology page.

Looking for another pair? Start from the homepage or open the canonical URL for this comparison at /compare/IEMG-IWR.