BBSI vs NSP: Correlation
How closely do Barrett Business Services, Inc. (BBSI) and Insperity, Inc. (NSP) trade together? Their weekly returns over three years give a correlation of 0.52, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BBSI and NSP?
On 3 years of weekly data the BBSI/NSP correlation comes out at 0.52, moderate. The relationship has been stable: the 1-year correlation (0.60) sits close to the 3-year figure. The 5-year figure is 0.47, and annualized covariance runs at 853.5 %².
By 3-year correlation, NSP places #4 of the 16 assets tracked against BBSI. The last year tells two different stories: NSP led by 30.1 percentage points, -28.8% for BBSI against +1.3% for NSP. Note the risk asymmetry: NSP runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
BBSI vs NSP: side by side
| BBSI (Barrett Business Services, Inc.) | NSP (Insperity, Inc.) | |
|---|---|---|
| 1-year return | -28.8% | +1.3% |
| 5-year return | +89.3% | -44.3% |
| Volatility (ann.) | 30.3% | 54.1% |
| Beta vs S&P 500 | 0.64 | 0.97 |
| Max drawdown (3Y) | -45.3% | -81.5% |
| Market cap | $0.8B | $2.0B |
| P/E (trailing) | 25.3 | – |
| Dividend yield | 0.94% | 4.62% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BBSI | NSP |
|---|---|---|
| 2022 | +37.1% | -1.9% |
| 2023 | +25.8% | +5.2% |
| 2024 | +51.4% | -32.1% |
| 2025 | -16.0% | -47.8% |
| 2026 | -4.9% | +40.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BBSI and NSP good diversifiers for each other?
Only partially. A correlation of 0.52 means BBSI and NSP 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 BBSI and NSP?
The BBSI/NSP correlation stands at 0.52 on a 3-year window (1 year: 0.60, 5 years: 0.47), computed from weekly returns as of 2026-08-27.
Is NSP a good diversifier for BBSI?
Only partially. A correlation of 0.52 means BBSI and NSP share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.52 mean?
On the −1 to +1 scale, 0.52 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/bbsi-vs-nsp.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/bbsi-vs-nsp/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: BBSI correlations · NSP correlations
