NPKI vs. ESLA

Last updated Aug 1, 2026

NPKI (NPK International Inc) and ESLA (Estrella Immunopharma Inc.) are both stocks. NPKI operates in Oil & Gas Equipment & Services (Energy), while ESLA operates in Biotechnology (Healthcare). Over the past 3 years, NPKI returned 30.89%/yr vs -60.00%/yr for ESLA. Their 0.07 correlation means their historical movements had little consistent relationship.

Performance

NPKI vs. ESLA - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in NPK International Inc (NPKI) and Estrella Immunopharma Inc. (ESLA). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NPKI achieves a 4.78% return, which is significantly higher than ESLA's -54.25% 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%

ESLA

• 1D: -0.89%
• 1M: -27.36%
• 6M: -36.28%
• YTD: -54.25%
• 1Y: -16.52%
• 3Y*: -60.00%
• 5Y*: —
• 10Y*: —
• ALL TIME*: -41.63%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
ESLA Estrella Immunopharma Inc.	$22.97K	$34.41K	$39.55K
NPKI NPK International Inc	$12.78M	$12.49M	$14.68M

NPKI vs. ESLA - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
NPKI NPK International Inc	4.78%	55.41%	15.51%	60.00%	41.16%	8.49%
ESLA Estrella Immunopharma Inc.	-54.25%	30.00%	8.11%	-89.21%	3.83%	0.61%

Correlation

The correlation between NPKI and ESLA is 0.17, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.17
Correlation (3Y) Balances recent behavior with more history.	0.11
Correlation (All Time) Calculated using the full available price history since Sep 14, 2021	0.07

The correlation between NPKI and ESLA shifts across timeframes, from 0.07 (all time) to 0.17 (1 year), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap NPKI : $1.05B ESLA : $30.71M
EPS NPKI : $0.45 ESLA : -$0.34
Total Revenue (TTM) NPKI : $300.69M ESLA : $0.00
Gross Profit (TTM) NPKI : $106.08M ESLA : $0.00
EBITDA (TTM) NPKI : $57.53M ESLA : -$13.25M

Return for Risk

NPKI vs. ESLA — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

NPKI

NPKI Risk / Return Rank: 73
NPKI Sharpe Ratio Rank: 75
NPKI Sortino Ratio Rank: 69
NPKI Omega Ratio Rank: 69
NPKI Calmar Ratio Rank: 73
NPKI Martin Ratio Rank: 80

ESLA

ESLA Risk / Return Rank: 43
ESLA Sharpe Ratio Rank: 39
ESLA Sortino Ratio Rank: 50
ESLA Omega Ratio Rank: 48
ESLA Calmar Ratio Rank: 38
ESLA Martin Ratio Rank: 39

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

NPKI vs. ESLA - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for NPK International Inc (NPKI) and Estrella Immunopharma Inc. (ESLA). 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	ESLA	Difference
Sharpe ratio: Return per unit of total volatility	0.97	-0.13	+1.11
Sortino ratio: Return per unit of downside risk	1.44	0.65	+0.80
Omega ratio: Gain probability vs. loss probability	1.19	1.08	+0.11
Calmar ratio: Return relative to maximum drawdown	1.47	-0.20	+1.67
Martin ratio: Return relative to average drawdown	5.19	-0.30	+5.50

NPKI vs. ESLA - Sharpe Ratio Comparison

The current NPKI Sharpe Ratio is 0.97, which is higher than the ESLA Sharpe Ratio of -0.13. The chart below compares the historical Sharpe Ratios of NPKI and ESLA, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

NPKI vs. ESLA - Drawdown Comparison

The maximum NPKI drawdown since its inception was -97.22%, roughly equal to the maximum ESLA drawdown of -96.64%. Use the drawdown chart below to compare losses from any high point for NPKI and ESLA.

Drawdown Indicators

	NPKI	ESLA	Difference
Max Drawdown Largest peak-to-trough decline	-97.22%	-96.64%	-0.58%
Max Drawdown (1Y) Largest decline over 1 year	-26.30%	-76.60%	+50.30%
Max Drawdown (3Y) Largest decline over 3 years	-42.11%	-96.64%	+54.53%
Max Drawdown (5Y) Largest decline over 5 years	-49.37%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-94.07%	—	—
Current Drawdown Current decline from peak	-48.09%	-96.64%	+48.55%
Average Drawdown Average peak-to-trough decline	-60.01%	-56.67%	-3.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	7.43%	49.82%	-42.39%

Volatility

NPKI vs. ESLA - Volatility Comparison

The current volatility for NPK International Inc (NPKI) is 13.56%, while Estrella Immunopharma Inc. (ESLA) has a volatility of 23.99%. This indicates that NPKI experiences smaller price fluctuations and is considered to be less risky than ESLA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NPKI	ESLA	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.56%	23.99%	-10.43%
Volatility (6M) Calculated over the trailing 6-month period	31.35%	67.89%	-36.54%
Volatility (1Y) Calculated over the trailing 1-year period	39.65%	112.41%	-72.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	49.24%	133.39%	-84.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	62.16%	133.39%	-71.23%

Dividends

NPKI vs. ESLA - Dividend Comparison

Neither NPKI nor ESLA has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both NPKI and ESLA in my portfolio?

NPKI and ESLA have a correlation of 0.17, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NPKI or ESLA?

ESLA has higher volatility (23.99%) compared to NPKI (13.56%). In terms of maximum drawdown, NPKI dropped -97.22% vs ESLA's -96.64%.

Which has better risk-adjusted returns?

NPKI currently has the higher Sharpe Ratio (0.97 vs -0.13), 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.