IEFA vs MOBX: Correlation
How closely do iShares Core MSCI EAFE ETF (IEFA) and Mobix Labs, Inc. (MOBX) trade together? Their weekly returns over three years give a correlation of -0.23, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IEFA and MOBX?
On 3 years of weekly data the IEFA/MOBX correlation comes out at -0.23, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.47 versus -0.23 over 3 years. The 5-year figure is -0.16, and annualized covariance runs at -1127.5 %².
MOBX is close to the least connected end of IEFA's tracked universe, ranking #107 of 111. Correlation aside, the last 12 months split them widely, with IEFA ahead by 109.8 points (+21.8% versus -88.0%). Note the risk asymmetry: MOBX runs 22.2 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
IEFA vs MOBX: side by side
| IEFA (iShares Core MSCI EAFE ETF) | MOBX (Mobix Labs, Inc.) | |
|---|---|---|
| 1-year return | +21.8% | -88.0% |
| 5-year return | +54.5% | -98.8% |
| Volatility (ann.) | 15.0% | 333.1% |
| Beta vs S&P 500 | 0.77 | -0.62 |
| Max drawdown (3Y) | -13.8% | -99.1% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 3.35% | 0.00% |
| Expense ratio | 0.07% | – |
| Assets under management | $190.1B | – |
| Sector / category | ETF · International | US Listed |
On the fund side, IEFA sits in the Foreign Large Blend category at iShares, with $190.1B under management, 1620 holdings, a 0.07% expense ratio, a 3.35% trailing dividend yield.
Year-by-year returns
| Year | IEFA | MOBX |
|---|---|---|
| 2022 | -15.2% | +3.8% |
| 2023 | +18.0% | -60.6% |
| 2024 | +3.3% | -57.7% |
| 2025 | +32.1% | -84.3% |
| 2026 | +14.5% | -57.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IEFA and MOBX good diversifiers for each other?
Yes. With a correlation of -0.23, IEFA and MOBX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between IEFA and MOBX?
As of 2026-08-27, the correlation of weekly returns between IEFA and MOBX is -0.23 over 3 years, -0.47 over 1 year and -0.16 over 5 years.
Is MOBX a good diversifier for IEFA?
Yes. With a correlation of -0.23, IEFA and MOBX have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.23 mean?
A reading of -0.23 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/iefa-vs-mobx.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/iefa-vs-mobx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: IEFA correlations · MOBX correlations
