AFJK vs PLAB: Correlation
Aimei Health Technology Co., Ltd (AFJK) and Photronics, Inc. (PLAB) show a moderate relationship: their 3-year correlation of weekly returns is 0.48.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AFJK and PLAB?
Across a 3-year window, the weekly returns of AFJK and PLAB correlate at 0.48, moderate. Recent behaviour matches the longer record: 0.57 over 1 year against 0.48 over 3. Stretching to 5 years gives n/a, with an annualized covariance of 5404.2 %².
Within AFJK's tracked universe of 29 assets, PLAB comes in at #5 by 3-year correlation. Correlation aside, the last 12 months split them widely, with PLAB ahead by 17.8 points (+8.4% versus +26.2%). Risk is not evenly split, since AFJK carries 3.3 times the volatility of the other side.
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.
AFJK vs PLAB: side by side
| AFJK (Aimei Health Technology Co., Ltd) | PLAB (Photronics, Inc.) | |
|---|---|---|
| 1-year return | +8.4% | +26.2% |
| 5-year return | n/a | +106.4% |
| Volatility (ann.) | 197.3% | 60.0% |
| Beta vs S&P 500 | 0.18 | 1.56 |
| Max drawdown (3Y) | -86.8% | -50.6% |
| Market cap | – | $1.8B |
| P/E (trailing) | 174.3 | 10.8 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AFJK | PLAB |
|---|---|---|
| 2022 | – | -10.7% |
| 2023 | – | +86.4% |
| 2024 | – | -24.9% |
| 2025 | +498.2% | +35.8% |
| 2026 | -80.9% | -5.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AFJK and PLAB good diversifiers for each other?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between AFJK and PLAB?
Using weekly returns as of 2026-08-27: 0.48 over 3 years, with 0.57 over the last year and n/a over 5 years.
Is PLAB a good diversifier for AFJK?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.48 mean?
On the −1 to +1 scale, 0.48 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/afjk-vs-plab.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/afjk-vs-plab/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AFJK correlations · PLAB correlations
