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GASS vs. SPY
Performance
Return for Risk
Drawdowns
Volatility
Dividends

GASS vs. SPY

Last updated Jun 24, 2026

GASS (StealthGas Inc.) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, GASS returned 12.03%/yr vs 15.53%/yr for SPY. At a 0.24 correlation, their price movements are largely independent.

Performance

GASS vs. SPY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in StealthGas Inc. (GASS) and State Street SPDR S&P 500 ETF (SPY). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, GASS achieves a 21.37% return, which is significantly higher than SPY's 8.15% return. Over the past 10 years, GASS has underperformed SPY with an annualized return of 12.03%, while SPY has yielded a comparatively higher 15.53% annualized return.

GASS

1D
0.83%
1M
-14.11%
YTD
21.37%
6M
24.02%
1Y
26.22%
3Y*
30.43%
5Y*
35.01%
10Y*
12.03%

SPY

1D
-1.45%
1M
-1.36%
YTD
8.15%
6M
7.20%
1Y
23.59%
3Y*
20.68%
5Y*
13.05%
10Y*
15.53%
*Multi-year figures are annualized to reflect compound growth (CAGR)

GASS vs. SPY - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
GASS
StealthGas Inc.		21.37%24.25%-12.54%141.04%27.01%34.27%-31.49%24.28%-36.70%28.99%
SPY
State Street SPDR S&P 500 ETF		8.15%17.72%24.89%26.18%-18.18%28.73%18.33%31.22%-4.57%21.71%

Correlation

The correlation between GASS and SPY is 0.18, which is low. Their price movements are largely independent, making them effective diversification partners.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.18

Correlation (3Y)
Calculated over the trailing 3-year period

0.16

Correlation (5Y)
Calculated over the trailing 5-year period

0.18

Correlation (10Y)
Calculated over the trailing 10-year period

0.19

Correlation (All Time)
Calculated using the full available price history since Oct 6, 2005

0.24

Compare stocks, funds, or ETFs

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StealthGas Inc.

State Street SPDR S&P 500 ETF

Often compared with GASS:
GASS vs. DACGASS vs. KEXGASS vs. NATGASS vs. KNOPGASS vs. DDIGASS vs. DOCUGASS vs. ESEA
Often compared with SPY:
SPY vs. QQQSPY vs. VOOSPY vs. BRK-BSPY vs. RSPSPY vs. VTISPY vs. SCHDSPY vs. GLD

Return for Risk

GASS vs. SPY — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
GASS
GASS Risk / Return Rank: 6565
Overall Rank
GASS Sharpe Ratio Rank: 6868
Sharpe Ratio Rank
GASS Sortino Ratio Rank: 6464
Sortino Ratio Rank
GASS Omega Ratio Rank: 6060
Omega Ratio Rank
GASS Calmar Ratio Rank: 6767
Calmar Ratio Rank
GASS Martin Ratio Rank: 6666
Martin Ratio Rank
SPY
SPY Risk / Return Rank: 5959
Overall Rank
SPY Sharpe Ratio Rank: 5858
Sharpe Ratio Rank
SPY Sortino Ratio Rank: 5656
Sortino Ratio Rank
SPY Omega Ratio Rank: 5757
Omega Ratio Rank
SPY Calmar Ratio Rank: 5656
Calmar Ratio Rank
SPY Martin Ratio Rank: 6767
Martin Ratio Rank
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.

GASS vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for StealthGas Inc. (GASS) and State Street SPDR S&P 500 ETF (SPY). 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.

GASSSPYDifference
Sharpe ratioReturn per unit of total volatility
0.81
1.90

-1.09

Sortino ratioReturn per unit of downside risk
1.38
2.58

-1.20

Omega ratioGain probability vs. loss probability

1.16

1.34

-0.19

Calmar ratioReturn relative to maximum drawdown

1.27

2.67

-1.40

Martin ratioReturn relative to average drawdown

2.66

11.92

-9.26

GASS vs. SPY - Sharpe Ratio Comparison

The current GASS Sharpe Ratio is 0.81, which is lower than the SPY Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of GASS and SPY, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

GASS vs. SPY - Drawdown Comparison

The maximum GASS drawdown since its inception was -89.82%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for GASS and SPY.

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Drawdown Indicators

GASSSPYDifference

Max Drawdown

Largest peak-to-trough decline

-89.82%

-55.19%

-34.63%

Max Drawdown (1Y)

Largest decline over 1 year

-20.76%

-8.88%

-11.88%

Max Drawdown (3Y)

Largest decline over 3 years

-44.34%

-18.76%

-25.58%

Max Drawdown (5Y)

Largest decline over 5 years

-44.34%

-24.50%

-19.84%

Max Drawdown (10Y)

Largest decline over 10 years

-63.11%

-33.72%

-29.39%

Current Drawdown

Current decline from peak

-25.03%

-3.17%

-21.86%

Average Drawdown

Average peak-to-trough decline

-57.85%

-9.04%

-48.81%

Ulcer Index

Depth and duration of drawdowns from previous peaks

9.88%

1.98%

+7.90%

Volatility

GASS vs. SPY - Volatility Comparison

StealthGas Inc. (GASS) has a higher volatility of 12.57% compared to State Street SPDR S&P 500 ETF (SPY) at 4.87%. This indicates that GASS's price experiences larger fluctuations and is considered to be riskier than SPY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

GASSSPYDifference

Volatility (1M)

Calculated over the trailing 1-month period

12.57%

4.87%

+7.70%

Volatility (6M)

Calculated over the trailing 6-month period

26.34%

9.85%

+16.49%

Volatility (1Y)

Calculated over the trailing 1-year period

32.51%

12.50%

+20.01%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

49.49%

17.15%

+32.34%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

47.53%

17.95%

+29.58%

Dividends

GASS vs. SPY - Dividend Comparison

GASS has not paid dividends to shareholders, while SPY's dividend yield for the trailing twelve months is around 1.03%.

PositionTTM20252024202320222021202020192018201720162015
GASS
StealthGas Inc.		0.00%0.00%0.00%0.00%0.00%44.43%0.00%0.00%0.00%0.00%0.00%0.00%
SPY
State Street SPDR S&P 500 ETF		1.03%1.07%1.21%1.40%1.65%1.20%1.52%1.75%2.04%1.80%2.03%2.06%

Frequently Asked Questions

GASS and SPY have a correlation of 0.18, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

GASS has higher volatility (12.57%) compared to SPY (4.87%). In terms of maximum drawdown, GASS dropped -89.82% vs SPY's -55.19%.

SPY currently has the higher Sharpe Ratio (1.90 vs 0.81), 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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