Which is cheaper, EFA or IDAU?

EFA charges 0.32% a year and IDAU charges 0.30%, so IDAU is cheaper. Fees come from each fund's prospectus.

Are EFA and IDAU the same kind of fund?

No. EFA is an index ETF and IDAU is a buffer ETF, so they are built for different jobs. The table compares what both publish: return, cost and what each actually holds.

Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.

ETFIQetfiq.com · independent ETF data

EFA vs IDAU: how they differ

EFA and IDAU are measured over different days, and IDAU charges 0.30% against 0.32%.

iShares MSCI EAFE ETF and Corgi International Developed Equities 15% Structured Buffer ETF - August Series.

EFA and IDAU on the fields both publish, as of Sep 12, 2026. Source: ETFIQ.
	EFA iShares MSCI EAFE ETF	IDAU Corgi International Developed Equities 15% Structured Buffer ETF - August Series
Where it sits	Core index fund	Buffer ETF
Issuer	iShares	Corgi
What it is	Developed markets ex US	Defined outcome, 15% on EFA
Total return, 1 year	+18.2%	not published
S&P 500 over the same days	+17.5%	not published
Gap to the S&P 500	+0.7 pts	not available
Expense ratio	0.32%	0.30%
Holdings	705	not filed

EFA in plain words

EFA is an index equity fund tracking the Developed markets ex US. Over the year to Sep 11, 2026 it returned +18.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.32% a year. By its holdings filed for Apr 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 705 positions, with the top ten at 13.4%.

IDAU in plain words

The fund's price can fall 0.6% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, EFA can fall 0.6% from today's level to the point where the buffer begins. Protection left, in index points: 15.0% of the 15.0% buffer still sits below today's EFA level. 323 days remained on Sep 12, 2026. On Jul 31, 2027 the period ends and a new cap is set.

Questions people ask

Which is cheaper, EFA or IDAU?: EFA charges 0.32% a year and IDAU charges 0.30%, so IDAU is cheaper. Fees come from each fund's prospectus.
Are EFA and IDAU the same kind of fund?: No. EFA is an index ETF and IDAU is a buffer ETF, so they are built for different jobs. The table compares what both publish: return, cost and what each actually holds.

Other comparisons

Where to next

Where these figures came from

ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.

EFA against IDAU, ETFIQ, data as of Sep 12, 2026. Every figure is arithmetic on a named public source; the method is at etfiq.com/methodology. A comparison is not a recommendation.

Cite this page. ETFIQ, EFA against IDAU, data as of Sep 12, 2026. https://etfiq.com/compare/any/EFA-IDAU Free to use with attribution; the underlying files are at Open data.

A comparison is not a recommendation. Standards and sources