EFA vs MOBX: Correlation
iShares MSCI EAFE ETF (EFA) and Mobix Labs, Inc. (MOBX) show a negative relationship: their 3-year correlation of weekly returns is -0.23.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are EFA and MOBX?
Over the past 3 years, EFA and MOBX moved with a correlation of -0.23, which is negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.49 versus -0.23 over 3 years. Over 5 years the correlation is -0.16, and the annualized covariance of weekly returns is -1150.3 %².
Among the 109 assets we track against EFA, MOBX sits near the bottom by co-movement, at rank #105. Correlation aside, the last 12 months split them widely, with EFA ahead by 109.9 points (+21.9% versus -88.0%). Note the risk asymmetry: MOBX runs 22.4 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.
EFA vs MOBX: side by side
| EFA (iShares MSCI EAFE ETF) | MOBX (Mobix Labs, Inc.) | |
|---|---|---|
| 1-year return | +21.9% | -88.0% |
| 5-year return | +56.7% | -98.8% |
| Volatility (ann.) | 14.9% | 333.1% |
| Beta vs S&P 500 | 0.77 | -0.62 |
| Max drawdown (3Y) | -14.1% | -99.1% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 3.19% | 0.00% |
| Expense ratio | 0.32% | – |
| Assets under management | $78.0B | – |
| Sector / category | ETF · International | US Listed |
EFA, iShares's Foreign Large Blend fund, carries $78.0B under management, 666 holdings, a 0.32% expense ratio, a 3.19% trailing dividend yield.
Year-by-year returns
| Year | EFA | MOBX |
|---|---|---|
| 2022 | -14.4% | +3.8% |
| 2023 | +18.4% | -60.6% |
| 2024 | +3.5% | -57.7% |
| 2025 | +31.5% | -84.3% |
| 2026 | +14.3% | -57.3% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are EFA and MOBX good diversifiers for each other?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between EFA and MOBX?
The EFA/MOBX correlation stands at -0.23 on a 3-year window (1 year: -0.49, 5 years: -0.16), computed from weekly returns as of 2026-08-27.
Is MOBX a good diversifier for EFA?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
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/efa-vs-mobx.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/efa-vs-mobx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: EFA correlations · MOBX correlations
