ROCK-B.CO vs. AMBBY

Last updated Jun 5, 2026

ROCK-B.CO (Rockwool A/S) and AMBBY (Ambu A/S) are both stocks. ROCK-B.CO operates in Building Products & Equipment (Industrials), while AMBBY operates in Medical Devices (Healthcare). Over the past 5 years, ROCK-B.CO returned -6.74%/yr vs -21.83%/yr for AMBBY. At a 0.10 correlation, their price movements are largely independent.

Performance

ROCK-B.CO vs. AMBBY - Performance Comparison

The chart below illustrates the hypothetical performance of a DKK 10,000 investment in Rockwool A/S (ROCK-B.CO) and Ambu A/S (AMBBY). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

ROCK-B.CO is traded in DKK, while AMBBY is traded in USD. To make them comparable, the AMBBY values have been converted to DKK using the latest available exchange rates.

Returns By Period

In the year-to-date period, ROCK-B.CO achieves a -9.59% return, which is significantly higher than AMBBY's -21.45% return.

ROCK-B.CO

• 1D: 0.71%
• 1M: 3.59%
• YTD: -9.59%
• 6M: -6.71%
• 1Y: -32.72%
• 3Y*: 6.46%
• 5Y*: -6.74%
• 10Y*: 6.91%

AMBBY

• 1D: 0.77%
• 1M: 3.87%
• YTD: -21.45%
• 6M: -24.34%
• 1Y: -32.74%
• 3Y*: -15.30%
• 5Y*: -21.83%
• 10Y*: —

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

ROCK-B.CO vs. AMBBY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
ROCK-B.CO Rockwool A/S	-9.59%	-9.70%	31.62%	23.57%	-41.89%	27.09%	48.32%	-5.42%	-8.26%
AMBBY Ambu A/S	-21.45%	-10.07%	-8.93%	14.98%	-44.50%	-38.36%	136.60%	-34.23%	67.69%

Correlation

The correlation between ROCK-B.CO and AMBBY is 0.06, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.06
Correlation (3Y) Calculated over the trailing 3-year period	0.05
Correlation (5Y) Calculated over the trailing 5-year period	0.11
Correlation (All Time) Calculated using the full available price history since Apr 16, 2018	0.10

Return for Risk

ROCK-B.CO vs. AMBBY — Risk / Return Rank

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

ROCK-B.CO

ROCK-B.CO Risk / Return Rank: 12
ROCK-B.CO Sharpe Ratio Rank: 7
ROCK-B.CO Sortino Ratio Rank: 9
ROCK-B.CO Omega Ratio Rank: 9
ROCK-B.CO Calmar Ratio Rank: 15
ROCK-B.CO Martin Ratio Rank: 17

AMBBY

AMBBY Risk / Return Rank: 8
AMBBY Sharpe Ratio Rank: 7
AMBBY Sortino Ratio Rank: 10
AMBBY Omega Ratio Rank: 3
AMBBY Calmar Ratio Rank: 13
AMBBY Martin Ratio Rank: 7

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.

ROCK-B.CO vs. AMBBY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Rockwool A/S (ROCK-B.CO) and Ambu A/S (AMBBY). 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.

	ROCK-B.CO	AMBBY	Difference
Sharpe ratio: Return per unit of total volatility	-0.90	-0.90	0.00
Sortino ratio: Return per unit of downside risk	-1.15	-1.11	-0.04
Omega ratio: Gain probability vs. loss probability	0.85	0.80	+0.05
Calmar ratio: Return relative to maximum drawdown	-0.71	-0.76	+0.05
Martin ratio: Return relative to average drawdown	-1.14	-1.43	+0.28
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ROCK-B.CO vs. AMBBY - Sharpe Ratio Comparison

The current ROCK-B.CO Sharpe Ratio is -0.90, which is comparable to the AMBBY Sharpe Ratio of -0.90. The chart below compares the historical Sharpe Ratios of ROCK-B.CO and AMBBY, 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

	ROCK-B.CO	AMBBY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.90	-0.90	0.00
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.17	-0.45	+0.28
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.19	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.31	-0.08	+0.39

Drawdowns

ROCK-B.CO vs. AMBBY - Drawdown Comparison

The maximum ROCK-B.CO drawdown since its inception was -87.27%, which is greater than AMBBY's maximum drawdown of -82.72%. Use the drawdown chart below to compare losses from any high point for ROCK-B.CO and AMBBY.

Drawdown Indicators

	ROCK-B.CO	AMBBY	Difference
Max Drawdown Largest peak-to-trough decline	-87.27%	-82.72%	-4.55%
Max Drawdown (1Y) Largest decline over 1 year	-46.60%	-43.07%	-3.53%
Max Drawdown (3Y) Largest decline over 3 years	-47.86%	-59.42%	+11.56%
Max Drawdown (5Y) Largest decline over 5 years	-65.87%	-74.59%	+8.72%
Max Drawdown (10Y) Largest decline over 10 years	-65.87%	—	—
Current Drawdown Current decline from peak	-36.32%	-81.44%	+45.12%
Average Drawdown Average peak-to-trough decline	-36.43%	-56.02%	+19.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	28.76%	23.00%	+5.76%

Volatility

ROCK-B.CO vs. AMBBY - Volatility Comparison

Rockwool A/S (ROCK-B.CO) has a higher volatility of 10.86% compared to Ambu A/S (AMBBY) at 7.19%. This indicates that ROCK-B.CO's price experiences larger fluctuations and is considered to be riskier than AMBBY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ROCK-B.CO	AMBBY	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.86%	7.19%	+3.67%
Volatility (6M) Calculated over the trailing 6-month period	27.72%	20.48%	+7.24%
Volatility (1Y) Calculated over the trailing 1-year period	37.04%	36.60%	+0.44%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	39.86%	49.03%	-9.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	36.81%	72.77%	-35.96%

Dividends

ROCK-B.CO vs. AMBBY - Dividend Comparison

ROCK-B.CO's dividend yield for the trailing twelve months is around 2.08%, more than AMBBY's 0.63% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMBBY Ambu A/S	0.63%	0.48%	0.41%	0.00%	0.00%	0.18%	0.11%	0.00%	0.00%	0.00%	0.00%	0.00%
ROCK-B.CO Rockwool A/S	2.08%	2.80%	1.68%	1.77%	2.14%	1.12%	1.40%	1.89%	1.42%	1.07%	0.92%	1.17%

Financials

Frequently Asked Questions

Can I hold both ROCK-B.CO and AMBBY in my portfolio?

ROCK-B.CO and AMBBY have a correlation of 0.06, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.