INTT vs PRTS: Correlation
How closely do inTest Corporation (INTT) and CarParts.com, Inc. (PRTS) trade together? Their weekly returns over three years give a correlation of 0.33, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are INTT and PRTS?
Over the past 3 years, INTT and PRTS moved with a correlation of 0.33, which is moderate. The relationship has been stable: the 1-year correlation (0.29) sits close to the 3-year figure. Over 5 years the correlation is 0.27, and the annualized covariance of weekly returns is 1229.1 %².
PRTS is close to the least connected end of INTT's tracked universe, ranking #8 of 12. Correlation aside, the last 12 months split them widely, with INTT ahead by 71.6 points (+62.4% versus -9.2%).
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.
INTT vs PRTS: side by side
| INTT (inTest Corporation) | PRTS (CarParts.com, Inc.) | |
|---|---|---|
| 1-year return | +62.4% | -9.2% |
| 5-year return | -9.0% | -95.9% |
| Volatility (ann.) | 51.5% | 72.4% |
| Beta vs S&P 500 | 1.19 | 0.44 |
| Max drawdown (3Y) | -67.7% | -92.1% |
| Market cap | $0.1B | $0.1B |
| P/E (trailing) | 165.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | INTT | PRTS |
|---|---|---|
| 2022 | -19.0% | -44.1% |
| 2023 | +32.0% | -49.5% |
| 2024 | -36.8% | -65.8% |
| 2025 | -13.0% | -53.7% |
| 2026 | +55.0% | +43.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are INTT and PRTS good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.33 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between INTT and PRTS?
The INTT/PRTS correlation stands at 0.33 on a 3-year window (1 year: 0.29, 5 years: 0.27), computed from weekly returns as of 2026-08-27.
Is PRTS a good diversifier for INTT?
Yes, to a useful degree: a correlation of 0.33 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.33 mean?
On the −1 to +1 scale, 0.33 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/intt-vs-prts.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/intt-vs-prts/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: INTT correlations · PRTS correlations
