APT vs. SUI

Last updated Jun 3, 2026

APT (Alpha Pro Tech, Ltd.) and SUI (Sun Communities, Inc.) are both stocks. APT operates in Building Products & Equipment (Industrials), while SUI operates in REIT - Residential (Real Estate). Over the past 10 years, APT returned 8.00%/yr vs 8.97%/yr for SUI. At a 0.07 correlation, their price movements are largely independent.

Performance

APT vs. SUI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Alpha Pro Tech, Ltd. (APT) and Sun Communities, Inc. (SUI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, APT achieves a 22.97% return, which is significantly higher than SUI's -1.26% return. Over the past 10 years, APT has underperformed SUI with an annualized return of 8.00%, while SUI has yielded a comparatively higher 8.97% annualized return.

APT

• 1D: -3.19%
• 1M: 18.70%
• YTD: 22.97%
• 6M: 17.17%
• 1Y: 8.98%
• 3Y*: 13.95%
• 5Y*: -7.40%
• 10Y*: 8.00%

SUI

• 1D: 0.76%
• 1M: -4.18%
• YTD: -1.26%
• 6M: -3.06%
• 1Y: 1.28%
• 3Y*: 1.22%
• 5Y*: -3.34%
• 10Y*: 8.97%

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

APT vs. SUI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
APT Alpha Pro Tech, Ltd.	22.97%	-16.07%	-0.00%	31.59%	-32.66%	-46.46%	225.07%	-7.55%	-7.25%	14.29%
SUI Sun Communities, Inc.	-1.26%	7.49%	-5.19%	-3.81%	-30.32%	40.79%	3.58%	50.91%	12.89%	24.94%

Correlation

The correlation between APT and SUI is 0.15, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.15
Correlation (3Y) Calculated over the trailing 3-year period	0.10
Correlation (5Y) Calculated over the trailing 5-year period	0.13
Correlation (10Y) Calculated over the trailing 10-year period	0.05
Correlation (All Time) Calculated using the full available price history since Feb 17, 1999	0.07

Fundamentals

Market Cap APT : $56.41M SUI : $15.22B
EPS APT : $0.34 SUI : $11.21
PE Ratio APT : 15.89 SUI : 10.82
PS Ratio APT : 0.96 SUI : 6.50
PB Ratio APT : 0.90 SUI : 2.25
Total Revenue (TTM) APT : $59.91M SUI : $2.33B
Gross Profit (TTM) APT : $22.66M SUI : $1.35B
EBITDA (TTM) APT : $5.40M SUI : $654.40M

Return for Risk

APT vs. SUI — Risk / Return Rank

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

APT

APT Risk / Return Rank: 52
APT Sharpe Ratio Rank: 46
APT Sortino Ratio Rank: 50
APT Omega Ratio Rank: 48
APT Calmar Ratio Rank: 59
APT Martin Ratio Rank: 58

SUI

SUI Risk / Return Rank: 40
SUI Sharpe Ratio Rank: 42
SUI Sortino Ratio Rank: 35
SUI Omega Ratio Rank: 34
SUI Calmar Ratio Rank: 43
SUI Martin Ratio Rank: 44

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.

APT vs. SUI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Alpha Pro Tech, Ltd. (APT) and Sun Communities, Inc. (SUI). 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.

	APT	SUI	Difference
Sharpe ratio Return per unit of total volatility	0.18	0.07	+0.11
Sortino ratio Return per unit of downside risk	0.86	0.24	+0.62
Omega ratio Gain probability vs. loss probability	1.10	1.03	+0.07
Calmar ratio Return relative to maximum drawdown	0.88	0.14	+0.74
Martin ratio Return relative to average drawdown	1.86	0.36	+1.50
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

APT vs. SUI - Sharpe Ratio Comparison

The current APT Sharpe Ratio is 0.18, which is higher than the SUI Sharpe Ratio of 0.07. The chart below compares the historical Sharpe Ratios of APT and SUI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	APT	SUI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.18	0.07	+0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.15	-0.13	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.11	0.35	-0.24
Sharpe Ratio (All Time) Calculated using the full available price history	0.10	0.45	-0.35

Drawdowns

APT vs. SUI - Drawdown Comparison

The maximum APT drawdown since its inception was -85.95%, which is greater than SUI's maximum drawdown of -74.04%. Use the drawdown chart below to compare losses from any high point for APT and SUI.

Drawdown Indicators

	APT	SUI	Difference
Max Drawdown Largest peak-to-trough decline	-85.95%	-74.04%	-11.91%
Max Drawdown (1Y) Largest decline over 1 year	-17.91%	-11.48%	-6.43%
Max Drawdown (3Y) Largest decline over 3 years	-39.00%	-26.48%	-12.52%
Max Drawdown (5Y) Largest decline over 5 years	-69.28%	-48.72%	-20.56%
Max Drawdown (10Y) Largest decline over 10 years	-85.39%	-48.72%	-36.67%
Current Drawdown Current decline from peak	-78.38%	-32.55%	-45.83%
Average Drawdown Average peak-to-trough decline	-64.95%	-11.75%	-53.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.41%	4.42%	+3.99%

Volatility

APT vs. SUI - Volatility Comparison

Alpha Pro Tech, Ltd. (APT) has a higher volatility of 37.55% compared to Sun Communities, Inc. (SUI) at 5.80%. This indicates that APT's price experiences larger fluctuations and is considered to be riskier than SUI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	APT	SUI	Difference
Volatility (1M) Calculated over the trailing 1-month period	37.55%	5.80%	+31.75%
Volatility (6M) Calculated over the trailing 6-month period	43.97%	13.12%	+30.85%
Volatility (1Y) Calculated over the trailing 1-year period	51.80%	19.20%	+32.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	51.08%	24.88%	+26.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	71.70%	25.65%	+46.05%

Dividends

APT vs. SUI - Dividend Comparison

APT has not paid dividends to shareholders, while SUI's dividend yield for the trailing twelve months is around 3.50%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
APT Alpha Pro Tech, Ltd.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SUI Sun Communities, Inc.	3.50%	6.50%	3.06%	2.78%	2.46%	1.58%	2.08%	2.00%	2.79%	2.89%	3.39%	3.79%

Financials

APT vs. SUI - Profitability Comparison

The chart below illustrates the profitability comparison between Alpha Pro Tech, Ltd. and Sun Communities, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

APT - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Alpha Pro Tech, Ltd. reported a gross profit of 5.52M and revenue of 14.59M. Therefore, the gross margin over that period was 37.8%.

SUI - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Sun Communities, Inc. reported a gross profit of 422.20M and revenue of 507.90M. Therefore, the gross margin over that period was 83.1%.

APT - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Alpha Pro Tech, Ltd. reported an operating income of 580.00K and revenue of 14.59M, resulting in an operating margin of 4.0%.

SUI - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Sun Communities, Inc. reported an operating income of -6.30M and revenue of 507.90M, resulting in an operating margin of -1.2%.

APT - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Alpha Pro Tech, Ltd. reported a net income of 702.00K and revenue of 14.59M, resulting in a net margin of 4.8%.

SUI - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Sun Communities, Inc. reported a net income of -8.70M and revenue of 507.90M, resulting in a net margin of -1.7%.

Frequently Asked Questions

Can I hold both APT and SUI in my portfolio?

APT and SUI have a correlation of 0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, APT or SUI?

APT has higher volatility (37.55%) compared to SUI (5.80%). In terms of maximum drawdown, APT dropped -85.95% vs SUI's -74.04%.

Which has better risk-adjusted returns?

APT currently has the higher Sharpe Ratio (0.18 vs 0.07), 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.