CET vs IVV: Correlation
How closely do Central Securities Corporation (CET) and iShares Core S&P 500 ETF (IVV) trade together? Their weekly returns over three years give a correlation of 0.89, which is very strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CET and IVV?
Over the past 3 years, CET and IVV moved with a correlation of 0.89, which is very strong, meaning they move nearly in lockstep. Recent behaviour matches the longer record: 0.83 over 1 year against 0.89 over 3. Over 5 years the correlation is 0.86, and the annualized covariance of weekly returns is 164.4 %².
In CET's tracked universe of 38 assets, IVV sits right near the top at #1. The trailing year gives IVV the advantage: +15.7% versus +20.7%, a 5.0-point spread.
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.
CET vs IVV: side by side
| CET (Central Securities Corporation) | IVV (iShares Core S&P 500 ETF) | |
|---|---|---|
| 1-year return | +15.7% | +20.7% |
| 5-year return | +73.3% | +83.0% |
| Volatility (ann.) | 12.8% | 14.5% |
| Beta vs S&P 500 | 0.78 | 1.00 |
| Max drawdown (3Y) | -15.4% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | 7.3 | – |
| Dividend yield | 5.03% | 1.09% |
| Expense ratio | – | 0.03% |
| Assets under management | – | $869.2B |
| Sector / category | US Listed | ETF · US Large Cap |
IVV is a Large Blend fund from iShares: $869.2B under management, 503 holdings, a 0.03% expense ratio, a 1.09% trailing dividend yield.
Year-by-year returns
| Year | CET | IVV |
|---|---|---|
| 2022 | -19.7% | -18.2% |
| 2023 | +19.2% | +26.3% |
| 2024 | +26.8% | +24.9% |
| 2025 | +17.2% | +17.8% |
| 2026 | +8.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CET and IVV good diversifiers for each other?
No: a correlation of 0.89 means CET and IVV tend to fall together, which is precisely when diversification is supposed to help.
FAQ
What is the correlation between CET and IVV?
As of 2026-08-27, the correlation of weekly returns between CET and IVV is 0.89 over 3 years, 0.83 over 1 year and 0.86 over 5 years.
Is IVV a good diversifier for CET?
No: a correlation of 0.89 means CET and IVV tend to fall together, which is precisely when diversification is supposed to help.
What does a correlation of 0.89 mean?
A reading of 0.89 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/cet-vs-ivv.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cet-vs-ivv/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CET correlations · IVV correlations
