ACFN vs. SPY

Last updated Jun 25, 2026

ACFN (Acorn Energy, Inc.) is a stock, while SPY (State Street SPDR S&P 500 ETF) is S&P 500 fund tracking the S&P 500 Index. At a 0.22 correlation, their price movements are largely independent.

Performance

ACFN vs. SPY - Performance Comparison

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

Returns By Period

In the year-to-date period, ACFN achieves a 9.40% return, which is significantly higher than SPY's 8.10% return.

ACFN

• 1D: 0.68%
• 1M: -5.38%
• YTD: 9.40%
• 6M: 4.76%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

SPY

• 1D: -0.05%
• 1M: -1.41%
• YTD: 8.10%
• 6M: 6.77%
• 1Y: 22.18%
• 3Y*: 20.66%
• 5Y*: 12.96%
• 10Y*: 15.53%

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

ACFN vs. SPY - Yearly Performance Comparison

	2026 (YTD)	2025
ACFN Acorn Energy, Inc.	9.40%	-18.38%
SPY State Street SPDR S&P 500 ETF	8.10%	8.14%

Correlation

The correlation between ACFN and SPY is 0.22, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jul 24, 2025	0.22

Return for Risk

ACFN vs. SPY — Risk / Return Rank

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

ACFN

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

SPY

SPY Risk / Return Rank: 60
SPY Sharpe Ratio Rank: 59
SPY Sortino Ratio Rank: 57
SPY Omega Ratio Rank: 59
SPY Calmar Ratio Rank: 57
SPY Martin Ratio Rank: 67

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.

ACFN vs. SPY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Acorn Energy, Inc. (ACFN) 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.

	ACFN	SPY	Difference
Sharpe ratio: Return per unit of total volatility	—	1.79	—
Sortino ratio: Return per unit of downside risk	—	2.45	—
Omega ratio: Gain probability vs. loss probability	—	1.33	—
Calmar ratio: Return relative to maximum drawdown	—	2.51	—
Martin ratio: Return relative to average drawdown	—	11.15	—

Drawdowns

ACFN vs. SPY - Drawdown Comparison

The maximum ACFN drawdown since its inception was -58.11%, which is greater than SPY's maximum drawdown of -55.19%. Use the drawdown chart below to compare losses from any high point for ACFN and SPY.

Drawdown Indicators

	ACFN	SPY	Difference
Max Drawdown Largest peak-to-trough decline	-58.11%	-55.19%	-2.92%
Max Drawdown (1Y) Largest decline over 1 year	—	-8.88%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-18.76%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-24.50%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-33.72%	—
Current Drawdown Current decline from peak	-45.98%	-3.22%	-42.76%
Average Drawdown Average peak-to-trough decline	-32.45%	-9.03%	-23.42%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.99%	—

Volatility

Volatility by Period

	ACFN	SPY	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	4.85%	—
Volatility (6M) Calculated over the trailing 6-month period	—	9.81%	—
Volatility (1Y) Calculated over the trailing 1-year period	90.68%	12.47%	+78.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	90.68%	17.15%	+73.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	90.68%	17.95%	+72.73%

Dividends

ACFN vs. SPY - Dividend Comparison

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

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACFN Acorn Energy, 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%
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

Can I hold both ACFN and SPY in my portfolio?

ACFN and SPY have a correlation of 0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.