SOXX vs STK: Correlation
Measured on weekly returns over the past three years, iShares Semiconductor ETF (SOXX) and Columbia Seligman Premium Technology Growth Fund Inc (STK) carry a correlation of 0.83, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SOXX and STK?
Over the past 3 years, SOXX and STK moved with a correlation of 0.83, which is very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.79 over 1 year against 0.83 over 3. Over 5 years the correlation is 0.84, and the annualized covariance of weekly returns is 768.7 %².
Among the 127 assets we track against SOXX, STK ranks #8 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months SOXX outperformed by 33.2 percentage points (+110.0% for SOXX against +76.8% for STK).
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.
SOXX vs STK: side by side
| SOXX (iShares Semiconductor ETF) | STK (Columbia Seligman Premium Technology Growth Fund Inc) | |
|---|---|---|
| 1-year return | +110.0% | +76.8% |
| 5-year return | +247.5% | +153.2% |
| Volatility (ann.) | 35.2% | 26.4% |
| Beta vs S&P 500 | 1.93 | 1.51 |
| Max drawdown (3Y) | -41.4% | -26.6% |
| Market cap | – | – |
| P/E (trailing) | – | 5.9 |
| Dividend yield | 0.29% | 0.00% |
| Expense ratio | 0.33% | – |
| Assets under management | $44.7B | – |
| Sector / category | ETF · Thematic | US Listed |
On the fund side, SOXX sits in the Technology category at iShares, with $44.7B under management, 30 holdings, a 0.33% expense ratio, a 0.29% trailing dividend yield.
Year-by-year returns
| Year | SOXX | STK |
|---|---|---|
| 2022 | -35.1% | -30.4% |
| 2023 | +67.1% | +49.2% |
| 2024 | +12.9% | +17.7% |
| 2025 | +40.7% | +24.9% |
| 2026 | +74.7% | +47.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SOXX and STK good diversifiers for each other?
No: a correlation of 0.83 means SOXX and STK tend to fall together, which is precisely when diversification is supposed to help.
FAQ
What is the correlation between SOXX and STK?
As of 2026-08-27, the correlation of weekly returns between SOXX and STK is 0.83 over 3 years, 0.79 over 1 year and 0.84 over 5 years.
Is STK a good diversifier for SOXX?
No: a correlation of 0.83 means SOXX and STK tend to fall together, which is precisely when diversification is supposed to help.
What does a correlation of 0.83 mean?
On the −1 to +1 scale, 0.83 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/soxx-vs-stk.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/soxx-vs-stk/)
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Related comparisons
Hubs: SOXX correlations · STK correlations
