OPTT vs. SKYY

Last updated Jun 13, 2026

OPTT (Ocean Power Technologies, Inc.) is a stock, while SKYY (First Trust ISE Cloud Computing Index Fund) is Technology Equities fund tracking the ISE Cloud Computing Index. Over the past 10 years, OPTT returned -42.55%/yr vs 16.26%/yr for SKYY. At a 0.25 correlation, their price movements are largely independent.

Performance

OPTT vs. SKYY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Ocean Power Technologies, Inc. (OPTT) and First Trust ISE Cloud Computing Index Fund (SKYY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OPTT achieves a -8.60% return, which is significantly lower than SKYY's 3.03% return. Over the past 10 years, OPTT has underperformed SKYY with an annualized return of -42.55%, while SKYY has yielded a comparatively higher 16.26% annualized return.

OPTT

• 1D: -7.05%
• 1M: -19.42%
• YTD: -8.60%
• 6M: -35.10%
• 1Y: -49.32%
• 3Y*: -25.04%
• 5Y*: -36.18%
• 10Y*: -42.55%

SKYY

• 1D: 0.18%
• 1M: 6.69%
• YTD: 3.03%
• 6M: 1.79%
• 1Y: 13.95%
• 3Y*: 20.38%
• 5Y*: 5.69%
• 10Y*: 16.26%

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

OPTT vs. SKYY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OPTT Ocean Power Technologies, Inc.	-8.60%	-70.59%	222.78%	-29.79%	-69.59%	-44.98%	209.20%	-87.21%	-69.08%	-62.71%
SKYY First Trust ISE Cloud Computing Index Fund	3.03%	9.20%	35.87%	52.18%	-44.68%	10.62%	57.77%	25.25%	6.01%	33.47%

Correlation

The correlation between OPTT and SKYY is 0.38, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.38
Correlation (3Y) Calculated over the trailing 3-year period	0.31
Correlation (5Y) Calculated over the trailing 5-year period	0.34
Correlation (10Y) Calculated over the trailing 10-year period	0.29
Correlation (All Time) Calculated using the full available price history since Jul 6, 2011	0.25

The correlation between OPTT and SKYY shifts across timeframes, from 0.25 (all time) to 0.38 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

OPTT vs. SKYY — Risk / Return Rank

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

OPTT

OPTT Risk / Return Rank: 23
OPTT Sharpe Ratio Rank: 22
OPTT Sortino Ratio Rank: 28
OPTT Omega Ratio Rank: 28
OPTT Calmar Ratio Rank: 15
OPTT Martin Ratio Rank: 20

SKYY

SKYY Risk / Return Rank: 17
SKYY Sharpe Ratio Rank: 18
SKYY Sortino Ratio Rank: 19
SKYY Omega Ratio Rank: 18
SKYY Calmar Ratio Rank: 16
SKYY Martin Ratio Rank: 15

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.

OPTT vs. SKYY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ocean Power Technologies, Inc. (OPTT) and First Trust ISE Cloud Computing Index Fund (SKYY). 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.

	OPTT	SKYY	Difference
Sharpe ratio: Return per unit of total volatility	-0.47	0.49	-0.96
Sortino ratio: Return per unit of downside risk	-0.19	0.89	-1.08
Omega ratio: Gain probability vs. loss probability	0.98	1.11	-0.13
Calmar ratio: Return relative to maximum drawdown	-0.73	0.51	-1.24
Martin ratio: Return relative to average drawdown	-1.07	1.13	-2.20

OPTT vs. SKYY - Sharpe Ratio Comparison

The current OPTT Sharpe Ratio is -0.47, which is lower than the SKYY Sharpe Ratio of 0.49. The chart below compares the historical Sharpe Ratios of OPTT and SKYY, 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

OPTT vs. SKYY - Drawdown Comparison

The maximum OPTT drawdown since its inception was -100.00%, which is greater than SKYY's maximum drawdown of -53.20%. Use the drawdown chart below to compare losses from any high point for OPTT and SKYY.

Drawdown Indicators

	OPTT	SKYY	Difference
Max Drawdown Largest peak-to-trough decline	-100.00%	-53.20%	-46.80%
Max Drawdown (1Y) Largest decline over 1 year	-67.80%	-27.39%	-40.41%
Max Drawdown (3Y) Largest decline over 3 years	-83.20%	-31.80%	-51.40%
Max Drawdown (5Y) Largest decline over 5 years	-95.71%	-53.20%	-42.51%
Max Drawdown (10Y) Largest decline over 10 years	-99.95%	-53.20%	-46.75%
Current Drawdown Current decline from peak	-99.99%	-13.63%	-86.36%
Average Drawdown Average peak-to-trough decline	-88.52%	-10.90%	-77.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	46.08%	12.34%	+33.74%

Volatility

OPTT vs. SKYY - Volatility Comparison

Ocean Power Technologies, Inc. (OPTT) has a higher volatility of 36.85% compared to First Trust ISE Cloud Computing Index Fund (SKYY) at 13.09%. This indicates that OPTT's price experiences larger fluctuations and is considered to be riskier than SKYY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OPTT	SKYY	Difference
Volatility (1M) Calculated over the trailing 1-month period	36.85%	13.09%	+23.76%
Volatility (6M) Calculated over the trailing 6-month period	85.09%	23.88%	+61.21%
Volatility (1Y) Calculated over the trailing 1-year period	104.79%	28.45%	+76.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	121.99%	30.67%	+91.32%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	127.48%	26.90%	+100.58%

Dividends

OPTT vs. SKYY - Dividend Comparison

Neither OPTT nor SKYY has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OPTT Ocean Power Technologies, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SKYY First Trust ISE Cloud Computing Index Fund	0.00%	0.00%	0.00%	0.00%	0.23%	0.78%	0.17%	0.54%	0.37%	0.27%	0.35%	0.41%

Frequently Asked Questions

Can I hold both OPTT and SKYY in my portfolio?

OPTT and SKYY have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OPTT or SKYY?

OPTT has higher volatility (36.85%) compared to SKYY (13.09%). In terms of maximum drawdown, OPTT dropped -100.00% vs SKYY's -53.20%.

Which has better risk-adjusted returns?

SKYY currently has the higher Sharpe Ratio (0.49 vs -0.47), 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.