NSSC vs. SEI

Last updated Jun 13, 2026

NSSC (Napco Security Technologies, Inc.) and SEI (Solaris Energy Infrastructure, Inc) are both stocks. NSSC operates in Security & Protection Services (Industrials), while SEI operates in Oil & Gas Equipment & Services (Energy). Over the past 5 years, NSSC returned 17.77%/yr vs 53.72%/yr for SEI. At a 0.20 correlation, their price movements are largely independent.

Performance

NSSC vs. SEI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Napco Security Technologies, Inc. (NSSC) and Solaris Energy Infrastructure, Inc (SEI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, NSSC achieves a -10.06% return, which is significantly lower than SEI's 61.67% return.

NSSC

• 1D: 2.59%
• 1M: -1.36%
• YTD: -10.06%
• 6M: -10.89%
• 1Y: 33.60%
• 3Y*: -1.04%
• 5Y*: 17.77%
• 10Y*: 28.00%

SEI

• 1D: -2.67%
• 1M: -3.95%
• YTD: 61.67%
• 6M: 61.32%
• 1Y: 167.96%
• 3Y*: 112.03%
• 5Y*: 53.72%
• 10Y*: —

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

NSSC vs. SEI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NSSC Napco Security Technologies, Inc.	-10.06%	19.22%	4.97%	25.59%	9.96%	90.62%	-10.79%	86.60%	80.00%	-5.91%
SEI Solaris Energy Infrastructure, Inc	61.67%	62.29%	277.66%	-15.75%	57.46%	-15.55%	-38.09%	19.10%	-43.06%	75.35%

Correlation

The correlation between NSSC and SEI is 0.16, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.16
Correlation (3Y) Calculated over the trailing 3-year period	0.21
Correlation (5Y) Calculated over the trailing 5-year period	0.18
Correlation (All Time) Calculated using the full available price history since May 12, 2017	0.20

Fundamentals

Market Cap NSSC : $1.33B SEI : $3.66B
EPS NSSC : $1.03 SEI : $1.03
PE Ratio NSSC : 36.28 SEI : 72.19
PS Ratio NSSC : 6.79 SEI : 4.83
PB Ratio NSSC : 7.47 SEI : 4.69
Total Revenue (TTM) NSSC : $197.23M SEI : $692.11M
Gross Profit (TTM) NSSC : $112.37M SEI : $235.28M
EBITDA (TTM) NSSC : $42.52M SEI : $249.65M

Return for Risk

NSSC vs. SEI — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

NSSC

NSSC Risk / Return Rank: 67
NSSC Sharpe Ratio Rank: 68
NSSC Sortino Ratio Rank: 64
NSSC Omega Ratio Rank: 65
NSSC Calmar Ratio Rank: 68
NSSC Martin Ratio Rank: 71

SEI

SEI Risk / Return Rank: 91
SEI Sharpe Ratio Rank: 92
SEI Sortino Ratio Rank: 87
SEI Omega Ratio Rank: 85
SEI Calmar Ratio Rank: 95
SEI Martin Ratio Rank: 94

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

NSSC vs. SEI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Napco Security Technologies, Inc. (NSSC) and Solaris Energy Infrastructure, Inc (SEI). 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.

	NSSC	SEI	Difference
Sharpe ratio: Return per unit of total volatility	0.80	2.31	-1.52
Sortino ratio: Return per unit of downside risk	1.32	2.74	-1.42
Omega ratio: Gain probability vs. loss probability	1.18	1.33	-0.15
Calmar ratio: Return relative to maximum drawdown	1.31	6.39	-5.08
Martin ratio: Return relative to average drawdown	3.54	16.09	-12.55

NSSC vs. SEI - Sharpe Ratio Comparison

The current NSSC Sharpe Ratio is 0.80, which is lower than the SEI Sharpe Ratio of 2.31. The chart below compares the historical Sharpe Ratios of NSSC and SEI, 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

NSSC vs. SEI - Drawdown Comparison

The maximum NSSC drawdown since its inception was -93.20%, which is greater than SEI's maximum drawdown of -79.49%. Use the drawdown chart below to compare losses from any high point for NSSC and SEI.

Drawdown Indicators

	NSSC	SEI	Difference
Max Drawdown Largest peak-to-trough decline	-93.20%	-79.49%	-13.71%
Max Drawdown (1Y) Largest decline over 1 year	-25.72%	-26.43%	+0.71%
Max Drawdown (3Y) Largest decline over 3 years	-65.43%	-55.37%	-10.06%
Max Drawdown (5Y) Largest decline over 5 years	-65.43%	-55.37%	-10.06%
Max Drawdown (10Y) Largest decline over 10 years	-65.43%	—	—
Current Drawdown Current decline from peak	-33.82%	-5.65%	-28.17%
Average Drawdown Average peak-to-trough decline	-38.20%	-38.61%	+0.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	9.52%	10.48%	-0.96%

Volatility

NSSC vs. SEI - Volatility Comparison

The current volatility for Napco Security Technologies, Inc. (NSSC) is 10.62%, while Solaris Energy Infrastructure, Inc (SEI) has a volatility of 21.30%. This indicates that NSSC experiences smaller price fluctuations and is considered to be less risky than SEI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NSSC	SEI	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.62%	21.30%	-10.68%
Volatility (6M) Calculated over the trailing 6-month period	32.37%	53.09%	-20.72%
Volatility (1Y) Calculated over the trailing 1-year period	42.31%	73.22%	-30.91%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	50.99%	66.77%	-15.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	49.57%	62.28%	-12.71%

Dividends

NSSC vs. SEI - Dividend Comparison

NSSC's dividend yield for the trailing twelve months is around 1.56%, more than SEI's 0.65% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
NSSC Napco Security Technologies, Inc.	1.56%	1.31%	1.27%	0.65%	0.00%	0.00%	0.00%	0.00%	0.00%
SEI Solaris Energy Infrastructure, Inc	0.65%	1.04%	1.67%	5.65%	4.23%	6.41%	5.16%	2.89%	0.83%

Financials

NSSC vs. SEI - Profitability Comparison

The chart below illustrates the profitability comparison between Napco Security Technologies, Inc. and Solaris Energy Infrastructure, Inc over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

NSSC - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Napco Security Technologies, Inc. reported a gross profit of 29.49M and revenue of 49.17M. Therefore, the gross margin over that period was 60.0%.

SEI - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Solaris Energy Infrastructure, Inc reported a gross profit of 72.72M and revenue of 196.24M. Therefore, the gross margin over that period was 37.1%.

NSSC - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Napco Security Technologies, Inc. reported an operating income of -1.19M and revenue of 49.17M, resulting in an operating margin of -2.4%.

SEI - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Solaris Energy Infrastructure, Inc reported an operating income of 50.56M and revenue of 196.24M, resulting in an operating margin of 25.8%.

NSSC - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Napco Security Technologies, Inc. reported a net income of -408.00K and revenue of 49.17M, resulting in a net margin of -0.8%.

SEI - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Solaris Energy Infrastructure, Inc reported a net income of 21.44M and revenue of 196.24M, resulting in a net margin of 10.9%.

Frequently Asked Questions

Can I hold both NSSC and SEI in my portfolio?

NSSC and SEI have a correlation of 0.16, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NSSC or SEI?

SEI has higher volatility (21.30%) compared to NSSC (10.62%). In terms of maximum drawdown, NSSC dropped -93.20% vs SEI's -79.49%.

Which has better risk-adjusted returns?

SEI currently has the higher Sharpe Ratio (2.31 vs 0.80), 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.