ATEYY vs. ACFN

Last updated Jun 19, 2026

ATEYY (Advantest Corp DRC) and ACFN (Acorn Energy, Inc.) are both stocks. Both are in the Technology sector — ATEYY in Semiconductor Equipment & Materials, ACFN in Scientific & Technical Instruments. At a 0.15 correlation, their price movements are largely independent.

Performance

ATEYY vs. ACFN - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Advantest Corp DRC (ATEYY) and Acorn Energy, Inc. (ACFN). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ATEYY achieves a 54.36% return, which is significantly higher than ACFN's 7.95% return.

ATEYY

• 1D: 4.03%
• 1M: 19.20%
• YTD: 54.36%
• 6M: 58.08%
• 1Y: 193.66%
• 3Y*: 77.83%
• 5Y*: 53.71%
• 10Y*: 53.36%

ACFN

• 1D: -5.01%
• 1M: -2.40%
• YTD: 7.95%
• 6M: 9.40%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

ATEYY vs. ACFN - Yearly Performance Comparison

	2026 (YTD)	2025
ATEYY Advantest Corp DRC	54.36%	59.12%
ACFN Acorn Energy, Inc.	7.95%	-18.38%

Correlation

The correlation between ATEYY and ACFN is 0.15, 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	0.15

Fundamentals

Market Cap ATEYY : $142.26B ACFN : $40.85M
EPS ATEYY : ¥520.21 ACFN : $0.78
PE Ratio ATEYY : 60.38 ACFN : 20.97
PEG Ratio ATEYY : 0.77 ACFN : 0.02
PS Ratio ATEYY : 20.08 ACFN : 3.89
PB Ratio ATEYY : 28.67 ACFN : 4.87
Total Revenue (TTM) ATEYY : ¥1.14T ACFN : $10.61M
Gross Profit (TTM) ATEYY : ¥736.09B ACFN : $8.27M
EBITDA (TTM) ATEYY : ¥533.69B ACFN : $1.38M

Return for Risk

ATEYY vs. ACFN — Risk / Return Rank

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

ATEYY

ATEYY Risk / Return Rank: 92
ATEYY Sharpe Ratio Rank: 95
ATEYY Sortino Ratio Rank: 90
ATEYY Omega Ratio Rank: 88
ATEYY Calmar Ratio Rank: 94
ATEYY Martin Ratio Rank: 94

ACFN

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

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.

ATEYY vs. ACFN - Risk-Adjusted Trends Comparison

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

	ATEYY	ACFN	Difference
Sharpe ratio: Return per unit of total volatility	2.79	—	—
Sortino ratio: Return per unit of downside risk	3.09	—	—
Omega ratio: Gain probability vs. loss probability	1.38	—	—
Calmar ratio: Return relative to maximum drawdown	5.87	—	—
Martin ratio: Return relative to average drawdown	15.77	—	—

Drawdowns

ATEYY vs. ACFN - Drawdown Comparison

The maximum ATEYY drawdown since its inception was -56.48%, roughly equal to the maximum ACFN drawdown of -58.11%. Use the drawdown chart below to compare losses from any high point for ATEYY and ACFN.

Drawdown Indicators

	ATEYY	ACFN	Difference
Max Drawdown Largest peak-to-trough decline	-56.48%	-58.11%	+1.63%
Max Drawdown (1Y) Largest decline over 1 year	-33.24%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-44.70%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-56.48%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-56.48%	—	—
Current Drawdown Current decline from peak	-1.68%	-46.70%	+45.02%
Average Drawdown Average peak-to-trough decline	-14.21%	-32.27%	+18.06%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.33%	—	—

Volatility

Volatility by Period

	ATEYY	ACFN	Difference
Volatility (1M) Calculated over the trailing 1-month period	27.25%	—	—
Volatility (6M) Calculated over the trailing 6-month period	54.67%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	69.99%	91.28%	-21.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	53.40%	91.28%	-37.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	48.63%	91.28%	-42.65%

Dividends

ATEYY vs. ACFN - Dividend Comparison

Neither ATEYY nor ACFN has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
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%
ATEYY Advantest Corp DRC	0.00%	0.11%	0.22%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	1.18%	1.24%

Financials

ATEYY vs. ACFN - Profitability Comparison

The chart below illustrates the profitability comparison between Advantest Corp DRC and Acorn Energy, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

ATEYY - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Advantest Corp DRC reported a gross profit of 225.18B and revenue of 334.10B. Therefore, the gross margin over that period was 67.4%.

ACFN - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Acorn Energy, Inc. reported a gross profit of 1.79M and revenue of 2.23M. Therefore, the gross margin over that period was 80.2%.

ATEYY - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Advantest Corp DRC reported an operating income of 156.38B and revenue of 334.10B, resulting in an operating margin of 46.8%.

ACFN - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Acorn Energy, Inc. reported an operating income of -129.00K and revenue of 2.23M, resulting in an operating margin of -5.8%.

ATEYY - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Advantest Corp DRC reported a net income of 129.16B and revenue of 334.10B, resulting in a net margin of 38.7%.

ACFN - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Acorn Energy, Inc. reported a net income of -77.00K and revenue of 2.23M, resulting in a net margin of -3.5%.

Frequently Asked Questions

Can I hold both ATEYY and ACFN in my portfolio?

ATEYY and ACFN 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.