NPKI vs. AROC
NPKI (NPK International Inc) and AROC (Archrock, Inc.) are both stocks. Both operate in the Oil & Gas Equipment & Services industry within the Energy sector. Over the past 10 years, NPKI returned 7.19%/yr vs 21.59%/yr for AROC. Their 0.55 correlation means they have sometimes moved together and sometimes differently.
Performance
NPKI vs. AROC - Performance Comparison
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Returns By Period
In the year-to-date period, NPKI achieves a 4.78% return, which is significantly lower than AROC's 39.21% return. Over the past 10 years, NPKI has underperformed AROC with an annualized return of 7.19%, while AROC has yielded a comparatively higher 21.59% annualized return.
NPKI
- 1D
- 0.24%
- 1M
- -12.72%
- 6M
- -9.56%
- YTD
- 4.78%
- 1Y
- 43.40%
- 3Y*
- 30.89%
- 5Y*
- 31.06%
- 10Y*
- 7.19%
- ALL TIME*
- 5.04%
AROC
- 1D
- 0.96%
- 1M
- -2.80%
- 6M
- 22.41%
- YTD
- 39.21%
- 1Y
- 63.97%
- 3Y*
- 45.94%
- 5Y*
- 39.49%
- 10Y*
- 21.59%
- ALL TIME*
- 15.77%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
AROC Archrock, Inc. | $57.96M | $57.92M | $72.45M |
| $12.78M | $12.49M | $14.68M |
NPKI vs. AROC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
NPKI NPK International Inc | 4.78% | 55.41% | 15.51% | 60.00% | 41.16% | 53.12% | -69.38% | -8.73% | -20.12% | 14.67% |
AROC Archrock, Inc. | 39.21% | 7.96% | 67.59% | 80.96% | 28.83% | -7.83% | -5.58% | 41.84% | -25.29% | -17.11% |
Correlation
The correlation between NPKI and AROC is 0.44, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.44 |
Correlation (3Y) Balances recent behavior with more history. | 0.45 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.54 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.54 |
Correlation (All Time) Calculated using the full available price history since Nov 4, 2015 | 0.55 |
The correlation between NPKI and AROC shifts across timeframes, from 0.44 (1 year) to 0.55 (all time), reflecting how their relationship changes across market environments.
Fundamentals
NPKI:
$1.05B
AROC:
$6.27B
NPKI:
$0.45
AROC:
$1.86
NPKI:
27.54
AROC:
19.20
NPKI:
1.32
AROC:
0.23
NPKI:
3.55
AROC:
4.12
NPKI:
2.89
AROC:
4.11
NPKI:
$300.69M
AROC:
$1.52B
NPKI:
$106.08M
AROC:
$689.41M
NPKI:
$57.53M
AROC:
$875.89M
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Return for Risk
NPKI vs. AROC — Risk / Return Rank
NPKI
AROC
NPKI vs. AROC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for NPK International Inc (NPKI) and Archrock, Inc. (AROC). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| NPKI | AROC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.84 | ||
| Sortino ratioReturn per unit of downside risk | -0.94 | ||
| Omega ratioGain probability vs. loss probability | 1.19 | 1.30 | -0.11 |
| Calmar ratioReturn relative to maximum drawdown | 1.47 | 3.45 | -1.98 |
| Martin ratioReturn relative to average drawdown | 5.19 | 9.49 | -4.30 |
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Drawdowns
NPKI vs. AROC - Drawdown Comparison
The maximum NPKI drawdown since its inception was -97.22%, which is greater than AROC's maximum drawdown of -84.90%. Use the drawdown chart below to compare losses from any high point for NPKI and AROC.
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Drawdown Indicators
| NPKI | AROC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -97.22% | -84.90% | -12.32% |
Max Drawdown (1Y)Largest decline over 1 year | -26.30% | -16.85% | -9.45% |
Max Drawdown (3Y)Largest decline over 3 years | -42.11% | -30.31% | -11.80% |
Max Drawdown (5Y)Largest decline over 5 years | -49.37% | -37.60% | -11.77% |
Max Drawdown (10Y)Largest decline over 10 years | -94.07% | -84.90% | -9.17% |
Current DrawdownCurrent decline from peak | -48.09% | -14.76% | -33.33% |
Average DrawdownAverage peak-to-trough decline | -60.01% | -24.61% | -35.40% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 7.43% | 6.12% | +1.31% |
Volatility
NPKI vs. AROC - Volatility Comparison
NPK International Inc (NPKI) has a higher volatility of 13.56% compared to Archrock, Inc. (AROC) at 11.62%. This indicates that NPKI's price experiences larger fluctuations and is considered to be riskier than AROC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| NPKI | AROC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 13.56% | 11.62% | +1.94% |
Volatility (6M)Calculated over the trailing 6-month period | 31.35% | 24.04% | +7.31% |
Volatility (1Y)Calculated over the trailing 1-year period | 39.65% | 31.94% | +7.71% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 49.24% | 36.53% | +12.71% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 62.16% | 50.25% | +11.91% |
Dividends
NPKI vs. AROC - Dividend Comparison
NPKI has not paid dividends to shareholders, while AROC's dividend yield for the trailing twelve months is around 2.40%.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
AROC Archrock, Inc. | 2.40% | 3.07% | 2.69% | 3.96% | 6.46% | 7.75% | 6.70% | 5.52% | 6.73% | 4.57% | 3.77% |
NPKI NPK International Inc | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Financials
NPKI vs. AROC - Financials Comparison
This section allows you to compare key financial metrics between NPK International Inc and Archrock, Inc.. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
NPKI vs. AROC - Profitability Comparison
NPKI - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, NPK International Inc reported a gross profit of 30.16M and revenue of 81.59M. Therefore, the gross margin over that period was 37.0%.
AROC - Gross Margin
Gross margin is calculated as gross profit divided by revenue. For the three months ending on Aug 2026, Archrock, Inc. reported a gross profit of 0.00 and revenue of 373.77M. Therefore, the gross margin over that period was 0.0%.
NPKI - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, NPK International Inc reported an operating income of -91.00K and revenue of 81.59M, resulting in an operating margin of -0.1%.
AROC - Operating Margin
Operating margin is calculated as operating income divided by revenue. For the three months ending on Aug 2026, Archrock, Inc. reported an operating income of 0.00 and revenue of 373.77M, resulting in an operating margin of 0.0%.
NPKI - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, NPK International Inc reported a net income of 11.97M and revenue of 81.59M, resulting in a net margin of 14.7%.
AROC - Net Margin
Net margin is calculated as net income divided by revenue. For the three months ending on Aug 2026, Archrock, Inc. reported a net income of 73.79M and revenue of 373.77M, resulting in a net margin of 19.7%.
Frequently Asked Questions
NPKI and AROC have a correlation of 0.44, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NPKI has higher volatility (13.56%) compared to AROC (11.62%). In terms of maximum drawdown, NPKI dropped -97.22% vs AROC's -84.90%.
AROC currently has the higher Sharpe Ratio (1.82 vs 0.97), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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