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Data as of Oct 28, 2026.

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Across categories

EFA vs IDAU: Differences, Returns & Fees

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EFA and IDAU are measured over different days, and IDAU charges 0.30% to EFA's 0.32%.

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Net assets: $76.8bn on Oct 27, 2026 for iShares MSCI EAFE ETF, and $1.2m on Oct 28, 2026 for Corgi International Developed Equities 15% Structured Buffer ETF - August Series.

EFA on its own →IDAU on its own →
At a glance
+12.1%
EFA total return, 1 year
−3.9%
IDAU total return, since launch, Aug 4, 2026
0.32%
EFA expense ratio
0.30%
IDAU expense ratio

Pair scorecard

IDAU costs 0.02 points a year less; EFA is far larger, $76.8bn against $1.2m.

EFA vs IDAU: Differences, Returns & Fees
MeasureEFAIDAU
Return
Total return, 1 year+12.1%not published
Drawdown
Below its high4.7%, high on Aug 25, 2026
Benchmark
What it tracksMSCI EAFE IndexEFA
The outcome period
Buffer left, in index points12.7% of 15.0%
Days left in the period277
Period endsJul 31, 2027
Cost and size
Expense ratio0.32%0.30%
Net assets, as of Oct 27, 2026$76.8bn$1.2m
Holdings
Holdings in commonnot published
In the S&P 500, by weight0%
Top ten holdings, share of the fund14.3%

Method

Side by side

EFA iShares MSCI EAFE ETF IDAU Corgi International Developed Equities 15% Structured Buffer ETF - August Series
Where it sits Stock ETF Buffer ETF
Issuer iShares Corgi
What it is Tracks an index of Developed markets ex US Defined outcome, 15% on EFA
Total return, 1 year +12.1% −3.9% (since launch, Aug 4, 2026)
Its benchmark over the same days +14.3% (ACWX) −3.4% (EFA) (since launch, Aug 4, 2026)
Gap to its benchmark −2.2 pts vs ACWX −0.5 pts vs EFA (since launch, Aug 4, 2026)
Expense ratio 0.32% 0.30%
Holdings 665 not read by ETFIQ
Net assets, EFA as of Oct 27, 2026 and IDAU as of Oct 28, 2026 $76.8bn $1.2m

EFA and IDAU on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

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About each fund
EFA

EFA tracks an index of Developed markets ex US. Over the year to Oct 28, 2026 it returned +12.1% with distributions reinvested, against +14.3% for its benchmark, the MSCI ACWI ex USA Index. The prospectus expense ratio is 0.32% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 665 positions, with the top ten at 14.3%. It sat 4.7% below its high of Aug 25, 2026 on Oct 28, 2026.

IDAU

Protection left, in index points: 12.7% of the 15.0% buffer still sits below today's EFA level. 277 days remained on Oct 27, 2026. On Jul 31, 2027 the period ends and a new cap is set.

Questions people ask

Are EFA and IDAU in the same category?
EFA is a stock ETF and IDAU is a buffer ETF, so they do different jobs. The table compares what both publish: return, cost and holdings.
Which is cheaper, EFA or IDAU?
IDAU is cheaper, by 0.02 percentage points a year. That is about $2 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
EFA vs IDJLEFA vs IDMYEFA vs IDJNEFA vs OCTIIDAU vs IEFAIDAU vs VEAEFA vs JULIEFA vs QBIF
Where to next
EFA on its own →IDAU on its own →Hold both: look the portfolio through →Rankings →EFA dividend history →EFA holdings →Standards and sources →
Sources and dates
EFA filings on SEC EDGAR ↗
EFA prospectus with the expense ratio (SEC) ↗
iShares page for EFA ↗
IDAU filings on SEC EDGAR ↗
Corgi website ↗

Links are sources, not endorsements. A comparison is not a recommendation.

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ETFIQ, EFA against IDAU, data as of Oct 28, 2026. https://etfiq.com/compare/any/efa-vs-idau

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