OPTT vs. SPMO

Last updated Jun 5, 2026

OPTT (Ocean Power Technologies, Inc.) is a stock, while SPMO (Invesco S&P 500 Momentum ETF) is Momentum fund tracking the S&P 500 Momentum Index. Over the past 10 years, OPTT returned -41.98%/yr vs 20.77%/yr for SPMO. At a 0.22 correlation, their price movements are largely independent.

Performance

OPTT vs. SPMO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Ocean Power Technologies, Inc. (OPTT) and Invesco S&P 500 Momentum ETF (SPMO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with OPTT having a 29.33% return and SPMO slightly lower at 28.45%. Over the past 10 years, OPTT has underperformed SPMO with an annualized return of -41.98%, while SPMO has yielded a comparatively higher 20.77% annualized return.

OPTT

• 1D: -1.82%
• 1M: 10.86%
• YTD: 29.33%
• 6M: -11.82%
• 1Y: -29.51%
• 3Y*: -13.52%
• 5Y*: -30.71%
• 10Y*: -41.98%

SPMO

• 1D: -1.46%
• 1M: 10.84%
• YTD: 28.45%
• 6M: 27.50%
• 1Y: 43.92%
• 3Y*: 42.27%
• 5Y*: 23.92%
• 10Y*: 20.77%

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

OPTT vs. SPMO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OPTT Ocean Power Technologies, Inc.	29.33%	-70.59%	222.78%	-29.79%	-69.59%	-44.98%	209.20%	-87.21%	-69.08%	-62.71%
SPMO Invesco S&P 500 Momentum ETF	28.45%	26.58%	45.82%	17.56%	-10.45%	22.64%	28.25%	25.93%	-0.92%	27.76%

Correlation

The correlation between OPTT and SPMO is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.42
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (5Y) Calculated over the trailing 5-year period	0.28
Correlation (10Y) Calculated over the trailing 10-year period	0.22
Correlation (All Time) Calculated using the full available price history since Oct 13, 2015	0.22

The correlation between OPTT and SPMO shifts across timeframes, from 0.22 (all time) to 0.42 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

OPTT vs. SPMO — Risk / Return Rank

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

OPTT

OPTT Risk / Return Rank: 31
OPTT Sharpe Ratio Rank: 29
OPTT Sortino Ratio Rank: 36
OPTT Omega Ratio Rank: 36
OPTT Calmar Ratio Rank: 26
OPTT Martin Ratio Rank: 30

SPMO

SPMO Risk / Return Rank: 75
SPMO Sharpe Ratio Rank: 78
SPMO Sortino Ratio Rank: 76
SPMO Omega Ratio Rank: 75
SPMO Calmar Ratio Rank: 71
SPMO Martin Ratio Rank: 73

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. SPMO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ocean Power Technologies, Inc. (OPTT) and Invesco S&P 500 Momentum ETF (SPMO). 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.

	OPTT	SPMO	Difference
Sharpe ratio: Return per unit of total volatility	-0.29	2.49	-2.78
Sortino ratio: Return per unit of downside risk	0.24	3.38	-3.14
Omega ratio: Gain probability vs. loss probability	1.03	1.44	-0.41
Calmar ratio: Return relative to maximum drawdown	-0.45	3.47	-3.93
Martin ratio: Return relative to average drawdown	-0.66	13.52	-14.18
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OPTT vs. SPMO - Sharpe Ratio Comparison

The current OPTT Sharpe Ratio is -0.29, which is lower than the SPMO Sharpe Ratio of 2.49. The chart below compares the historical Sharpe Ratios of OPTT and SPMO, 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

	OPTT	SPMO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.29	2.49	-2.78
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.25	1.25	-1.50
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.33	1.03	-1.36
Sharpe Ratio (All Time) Calculated using the full available price history	-0.34	1.00	-1.34

Drawdowns

OPTT vs. SPMO - Drawdown Comparison

The maximum OPTT drawdown since its inception was -100.00%, which is greater than SPMO's maximum drawdown of -30.95%. Use the drawdown chart below to compare losses from any high point for OPTT and SPMO.

Drawdown Indicators

	OPTT	SPMO	Difference
Max Drawdown Largest peak-to-trough decline	-100.00%	-30.95%	-69.05%
Max Drawdown (1Y) Largest decline over 1 year	-65.30%	-12.70%	-52.60%
Max Drawdown (3Y) Largest decline over 3 years	-82.37%	-20.13%	-62.24%
Max Drawdown (5Y) Largest decline over 5 years	-95.71%	-22.74%	-72.97%
Max Drawdown (10Y) Largest decline over 10 years	-99.95%	-30.95%	-69.00%
Current Drawdown Current decline from peak	-100.00%	-1.46%	-98.54%
Average Drawdown Average peak-to-trough decline	-98.65%	-4.60%	-94.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	45.02%	3.26%	+41.76%

Volatility

OPTT vs. SPMO - Volatility Comparison

Ocean Power Technologies, Inc. (OPTT) has a higher volatility of 18.75% compared to Invesco S&P 500 Momentum ETF (SPMO) at 7.39%. This indicates that OPTT's price experiences larger fluctuations and is considered to be riskier than SPMO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OPTT	SPMO	Difference
Volatility (1M) Calculated over the trailing 1-month period	18.75%	7.39%	+11.36%
Volatility (6M) Calculated over the trailing 6-month period	79.72%	14.49%	+65.23%
Volatility (1Y) Calculated over the trailing 1-year period	101.88%	17.70%	+84.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	121.44%	19.30%	+102.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	127.40%	20.31%	+107.09%

Dividends

OPTT vs. SPMO - Dividend Comparison

OPTT has not paid dividends to shareholders, while SPMO's dividend yield for the trailing twelve months is around 0.66%.

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%
SPMO Invesco S&P 500 Momentum ETF	0.66%	0.73%	0.48%	1.63%	1.66%	0.52%	1.27%	1.39%	1.05%	0.77%	1.94%	0.36%

Frequently Asked Questions

Can I hold both OPTT and SPMO in my portfolio?

OPTT and SPMO have a correlation of 0.42, 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 SPMO?

OPTT has higher volatility (18.75%) compared to SPMO (7.39%). In terms of maximum drawdown, OPTT dropped -100.00% vs SPMO's -30.95%.

Which has better risk-adjusted returns?

SPMO currently has the higher Sharpe Ratio (2.49 vs -0.29), 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.