BELFA vs BELFB: Correlation
Measured on weekly returns over the past three years, Bel Fuse Inc. (BELFA) and Bel Fuse Inc. (BELFB) carry a correlation of 0.91, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BELFA and BELFB?
Across a 3-year window, the weekly returns of BELFA and BELFB correlate at 0.91, very strong, meaning they move nearly in lockstep. Little has changed lately, as the 1-year reading of 0.94 lands near the 3-year figure. Stretching to 5 years gives 0.86, with an annualized covariance of 2174.4 %².
BELFB is one of the assets that tracks BELFA most closely: it ranks #1 out of the 10 assets we track against BELFA. Twelve-month performance is nearly a tie, at +80.5% for BELFA and +83.7% for BELFB.
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.
BELFA vs BELFB: side by side
| BELFA (Bel Fuse Inc.) | BELFB (Bel Fuse Inc.) | |
|---|---|---|
| 1-year return | +80.5% | +83.7% |
| 5-year return | +1292.5% | +1827.0% |
| Volatility (ann.) | 48.6% | 49.1% |
| Beta vs S&P 500 | 1.30 | 1.30 |
| Max drawdown (3Y) | -43.4% | -33.4% |
| Market cap | $3.1B | $3.7B |
| P/E (trailing) | 54.3 | 65.2 |
| Dividend yield | 0.11% | 0.09% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BELFA | BELFB |
|---|---|---|
| 2022 | +117.0% | +158.7% |
| 2023 | +102.0% | +104.2% |
| 2024 | +39.8% | +24.0% |
| 2025 | +69.0% | +106.3% |
| 2026 | +40.6% | +52.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BELFA and BELFB good diversifiers for each other?
No. With a correlation of 0.91, BELFA and BELFB move nearly in lockstep, so holding both adds very little diversification.
FAQ
What is the correlation between BELFA and BELFB?
The BELFA/BELFB correlation stands at 0.91 on a 3-year window (1 year: 0.94, 5 years: 0.86), computed from weekly returns as of 2026-08-27.
Is BELFB a good diversifier for BELFA?
No. With a correlation of 0.91, BELFA and BELFB move nearly in lockstep, so holding both adds very little diversification.
What does a correlation of 0.91 mean?
On the −1 to +1 scale, 0.91 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/belfa-vs-belfb.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/belfa-vs-belfb/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BELFA correlations · BELFB correlations
