DMRC vs STK: Correlation
How closely do Digimarc Corporation (DMRC) and Columbia Seligman Premium Technology Growth Fund Inc (STK) trade together? Their weekly returns over three years give a correlation of 0.51, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are DMRC and STK?
On 3 years of weekly data the DMRC/STK correlation comes out at 0.51, moderate. The relationship has been stable: the 1-year correlation (0.57) sits close to the 3-year figure. The 5-year figure is 0.46, and annualized covariance runs at 1037.2 %².
Few assets follow DMRC as closely as STK, which ranks #3 of 16 tracked partners. The last year tells two different stories: STK led by 102.9 percentage points, -26.1% for DMRC against +76.8% for STK. One caveat on sizing: DMRC is 2.9 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
DMRC vs STK: side by side
| DMRC (Digimarc Corporation) | STK (Columbia Seligman Premium Technology Growth Fund Inc) | |
|---|---|---|
| 1-year return | -26.1% | +76.8% |
| 5-year return | -77.7% | +153.2% |
| Volatility (ann.) | 76.3% | 26.4% |
| Beta vs S&P 500 | 2.38 | 1.51 |
| Max drawdown (3Y) | -90.8% | -26.6% |
| Market cap | $0.1B | – |
| P/E (trailing) | – | 5.9 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | DMRC | STK |
|---|---|---|
| 2022 | -53.2% | -30.4% |
| 2023 | +95.3% | +49.2% |
| 2024 | +3.7% | +17.7% |
| 2025 | -82.5% | +24.9% |
| 2026 | -4.9% | +47.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are DMRC and STK good diversifiers for each other?
Only partially. A correlation of 0.51 means DMRC and STK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between DMRC and STK?
As of 2026-08-27, the correlation of weekly returns between DMRC and STK is 0.51 over 3 years, 0.57 over 1 year and 0.46 over 5 years.
Is STK a good diversifier for DMRC?
Only partially. A correlation of 0.51 means DMRC and STK share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.51 mean?
A reading of 0.51 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/dmrc-vs-stk.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/dmrc-vs-stk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: DMRC correlations · STK correlations
