PairBook
HomePACS › PACS vs SPY

PACS vs SPY: Correlation

Measured on weekly returns over the past three years, PACS Group, Inc. (PACS) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.01, a near-zero link.

Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology

Correlation (3Y)
0.01
near-zero
Correlation (1Y)
-0.11
last 12 months
Correlation (5Y)
n/a
long-run
Ann. covariance
12.0
%² · weekly, annualized

How correlated are PACS and SPY?

Over the past 3 years, PACS and SPY moved with a correlation of 0.01, which is near zero, meaning they move largely independently. The link has loosened recently: the 1-year correlation (-0.11) runs below the 3-year figure (0.01). Over 5 years the correlation is n/a, and the annualized covariance of weekly returns is 12.0 %².

Among the 35 assets we track against PACS, SPY ranks #11 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months PACS outperformed by 252.4 percentage points (+273.0% for PACS against +20.6% for SPY). Risk is not evenly split, since PACS carries 8.3 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.

PACS vs SPY: side by side

PACS (PACS Group, Inc.)SPY (SPDR S&P 500 ETF Trust)
1-year return+273.0%+20.6%
5-year returnn/a+82.4%
Volatility (ann.)120.5%14.5%
Beta vs S&P 5000.061.00
Max drawdown (3Y)-82.0%-18.8%
Market cap$7.0B
P/E (trailing)25.9
Dividend yield0.00%1.01%
Expense ratio0.09%
Assets under management$795.3B
Sector / categoryUS ListedETF · US Large Cap
Higher yield: SPY 1.01% vs 0.00%Smaller drawdown: SPY -18.8% vs -82.0%

SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.

-13%0%+334%2025-09-052026-08-27
Both assets over the last year, indexed to 100 at the starting week. PACS · SPY

Year-by-year returns

YearPACSSPY
2022-18.2%
2023+26.2%
2024+24.9%
2025+192.8%+17.7%
2026+15.2%+13.7%

Calendar-year price returns; the current year is year-to-date as of the data date above.

Are PACS and SPY good diversifiers for each other?

Yes. With a correlation of 0.01, PACS and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.

FAQ

What is the correlation between PACS and SPY?

Using weekly returns as of 2026-08-27: 0.01 over 3 years, with -0.11 over the last year and n/a over 5 years.

Is SPY a good diversifier for PACS?

Yes. With a correlation of 0.01, PACS and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.

What does a correlation of 0.01 mean?

On the −1 to +1 scale, 0.01 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

JSON API · no key required
$ curl https://www.pairbook.io/api/v1/pairs/pacs-vs-spy.json

PACS vs SPY: 3-year weekly correlation 0.01PACS vs SPY0.01

Embed this badge (it refreshes with the data), with attribution:

[![PACS vs SPY correlation](https://www.pairbook.io/api/v1/badge/pacs-vs-spy.svg)](https://www.pairbook.io/pair/pacs-vs-spy/)

Free with attribution; caching and terms are described in the API documentation.

Related comparisons

Hubs: PACS correlations · SPY correlations