EFA vs IEFA: Which Is the Better Pick in 2026?

Overview

EFA and IEFA are both iShares ETFs tracking developed markets outside the U.S. and Canada, but they differ in their underlying indexes and cost structure. EFA uses the MSCI EAFE Index (large and mid-cap stocks), while IEFA uses the MSCI EAFE IMI Index, which adds small-cap exposure. The key distinction is cost: IEFA's expense ratio of 0.07% is substantially lower than EFA's 0.32%, a gap that compounds significantly over time for buy-and-hold investors.

How they differ

The foundational difference is breadth: IEFA's IMI methodology includes small-cap stocks alongside large and mid-cap holdings, whereas EFA focuses on large and mid-cap only. This gives IEFA a wider opportunity set and slightly different return potential depending on small-cap performance in developed markets. The fee gap is the second major distinction — IEFA charges 0.07% versus EFA's 0.32%, a 25-basis-point spread that will drag on relative performance year after year. Third, IEFA holds $196B in assets compared to EFA's $80.3B, making IEFA the more liquid and widely-held vehicle. Both offer semi-annual distributions; IEFA yields 3.14% versus EFA's 3.04%, a modest difference likely reflecting the small-cap tilt.

Who each is best for

EFA: Fits investors who prefer the simplicity and longer track record of a large-cap and mid-cap only exposure, or who already own complementary small-cap international positions and want to avoid overlap.

IEFA: Fits investors seeking comprehensive developed-market exposure at minimal cost, particularly those planning long holding periods where expense-ratio differences accumulate into meaningful return drag.

Key risks to know

• Small-cap concentration in IEFA: The inclusion of small-cap stocks in the IMI index exposes IEFA to higher volatility and potentially wider spreads during liquidity stress in developed markets. EFA's large and mid-cap focus offers a more established, liquid set of holdings.

• Currency exposure: Both funds carry significant exposure to foreign currencies (euro, yen, pound, Swiss franc). Currency movements can amplify or dampen returns independent of stock performance, and neither fund uses hedging.

• Valuation sensitivity: Developed international markets trade at different price-to-earnings and dividend-yield multiples than the U.S. Long-term periods of relative undervaluation (or overvaluation) can suppress or boost returns unpredictably.

• Overlap in holdings: The two indexes likely share substantial holdings in large European, Japanese, and Asian stocks, so owning both creates redundant exposure and increases the cost of diversification.

Bottom line

IEFA's significantly lower expense ratio and larger asset base make it the economically efficient choice for long-term exposure to developed markets ex-U.S. and Canada; that 25-basis-point fee advantage translates to roughly 0.25% annual return drag avoided. EFA may appeal to investors specifically seeking large and mid-cap-only exposure without small-cap dilution, though the cost difference is steep for that preference. Past performance does not predict future results.