INSW vs TNK: Correlation
Measured on weekly returns over the past three years, International Seaways, Inc. (INSW) and Teekay Tankers Ltd. (TNK) carry a correlation of 0.88, a very strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are INSW and TNK?
On 3 years of weekly data the INSW/TNK correlation comes out at 0.88, very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.89 over 1 year against 0.88 over 3. The 5-year figure is 0.84, and annualized covariance runs at 1248.0 %².
In INSW's tracked universe of 21 assets, TNK sits right near the top at #1. Correlation aside, the last 12 months split them widely, with INSW ahead by 63.0 points (+150.3% versus +87.3%).
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.
INSW vs TNK: side by side
| INSW (International Seaways, Inc.) | TNK (Teekay Tankers Ltd.) | |
|---|---|---|
| 1-year return | +150.3% | +87.3% |
| 5-year return | +861.9% | +813.1% |
| Volatility (ann.) | 36.8% | 38.5% |
| Beta vs S&P 500 | 0.50 | 0.51 |
| Max drawdown (3Y) | -50.4% | -52.4% |
| Market cap | $4.9B | $3.1B |
| P/E (trailing) | 6.0 | 4.9 |
| Dividend yield | 0.51% | 1.20% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | INSW | TNK |
|---|---|---|
| 2022 | +162.5% | +182.7% |
| 2023 | +42.9% | +69.2% |
| 2024 | -10.9% | -16.6% |
| 2025 | +45.0% | +39.6% |
| 2026 | +123.1% | +68.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are INSW and TNK good diversifiers for each other?
No. With a correlation of 0.88, INSW and TNK move nearly in lockstep, so holding both adds very little diversification.
FAQ
What is the correlation between INSW and TNK?
As of 2026-08-27, the correlation of weekly returns between INSW and TNK is 0.88 over 3 years, 0.89 over 1 year and 0.84 over 5 years.
Is TNK a good diversifier for INSW?
No. With a correlation of 0.88, INSW and TNK move nearly in lockstep, so holding both adds very little diversification.
What does a correlation of 0.88 mean?
A reading of 0.88 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/insw-vs-tnk.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/insw-vs-tnk/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: INSW correlations · TNK correlations
