ARQQ vs. QMCO

Last updated Jun 24, 2026

ARQQ (Arqit Quantum Inc.) and QMCO (Quantum Corporation) are both stocks. Both are in the Technology sector — ARQQ in Software - Infrastructure, QMCO in Computer Hardware. Over the past 3 years, ARQQ returned -0.52%/yr vs -13.85%/yr for QMCO. At a 0.30 correlation, their price movements are largely independent.

Performance

ARQQ vs. QMCO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Arqit Quantum Inc. (ARQQ) and Quantum Corporation (QMCO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ARQQ achieves a 32.72% return, which is significantly lower than QMCO's 114.11% return.

ARQQ

• 1D: 35.57%
• 1M: 66.04%
• YTD: 32.72%
• 6M: 14.69%
• 1Y: -24.73%
• 3Y*: -0.52%
• 5Y*: —
• 10Y*: —

QMCO

• 1D: -1.64%
• 1M: 52.60%
• YTD: 114.11%
• 6M: 90.75%
• 1Y: 68.62%
• 3Y*: -13.85%
• 5Y*: -36.88%
• 10Y*: -15.25%

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

ARQQ vs. QMCO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
ARQQ Arqit Quantum Inc.	32.72%	-43.67%	227.76%	-86.87%	-84.93%	158.92%
QMCO Quantum Corporation	114.11%	-88.04%	672.49%	-67.98%	-80.25%	-7.07%

Correlation

The correlation between ARQQ and QMCO is 0.55, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.55
Correlation (3Y) Calculated over the trailing 3-year period	0.41
Correlation (All Time) Calculated using the full available price history since Sep 7, 2021	0.30

Over the past year, ARQQ and QMCO have become more correlated (0.55) than their long-term average of 0.30, meaning their price movements have been converging.

Fundamentals

Market Cap ARQQ : $481.51M QMCO : $189.05M
EPS ARQQ : -$4.72 QMCO : -$8.86
PS Ratio ARQQ : 324.08 QMCO : 0.60
Total Revenue (TTM) ARQQ : $1.43M QMCO : $261.28M
Gross Profit (TTM) ARQQ : -$307.00K QMCO : $97.87M
EBITDA (TTM) ARQQ : -$68.30M QMCO : -$51.03M

Return for Risk

ARQQ vs. QMCO — Risk / Return Rank

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

ARQQ

ARQQ Risk / Return Rank: 37
ARQQ Sharpe Ratio Rank: 33
ARQQ Sortino Ratio Rank: 43
ARQQ Omega Ratio Rank: 41
ARQQ Calmar Ratio Rank: 33
ARQQ Martin Ratio Rank: 35

QMCO

QMCO Risk / Return Rank: 65
QMCO Sharpe Ratio Rank: 64
QMCO Sortino Ratio Rank: 71
QMCO Omega Ratio Rank: 67
QMCO Calmar Ratio Rank: 63
QMCO Martin Ratio Rank: 61

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.

ARQQ vs. QMCO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Arqit Quantum Inc. (ARQQ) and Quantum Corporation (QMCO). 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.

	ARQQ	QMCO	Difference
Sharpe ratio: Return per unit of total volatility	-0.22	0.66	-0.89
Sortino ratio: Return per unit of downside risk	0.46	1.69	-1.23
Omega ratio: Gain probability vs. loss probability	1.05	1.20	-0.15
Calmar ratio: Return relative to maximum drawdown	-0.31	1.02	-1.33
Martin ratio: Return relative to average drawdown	-0.45	1.79	-2.25

ARQQ vs. QMCO - Sharpe Ratio Comparison

The current ARQQ Sharpe Ratio is -0.22, which is lower than the QMCO Sharpe Ratio of 0.66. The chart below compares the historical Sharpe Ratios of ARQQ and QMCO, 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

ARQQ vs. QMCO - Drawdown Comparison

The maximum ARQQ drawdown since its inception was -99.60%, roughly equal to the maximum QMCO drawdown of -99.93%. Use the drawdown chart below to compare losses from any high point for ARQQ and QMCO.

Drawdown Indicators

	ARQQ	QMCO	Difference
Max Drawdown Largest peak-to-trough decline	-99.60%	-99.93%	+0.33%
Max Drawdown (1Y) Largest decline over 1 year	-79.78%	-67.72%	-12.06%
Max Drawdown (3Y) Largest decline over 3 years	-89.69%	-93.90%	+4.21%
Max Drawdown (5Y) Largest decline over 5 years	—	-98.26%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-98.67%	—
Current Drawdown Current decline from peak	-96.95%	-99.60%	+2.65%
Average Drawdown Average peak-to-trough decline	-88.82%	-88.09%	-0.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	54.58%	38.38%	+16.20%

Volatility

ARQQ vs. QMCO - Volatility Comparison

Arqit Quantum Inc. (ARQQ) has a higher volatility of 52.32% compared to Quantum Corporation (QMCO) at 41.79%. This indicates that ARQQ's price experiences larger fluctuations and is considered to be riskier than QMCO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ARQQ	QMCO	Difference
Volatility (1M) Calculated over the trailing 1-month period	52.32%	41.79%	+10.53%
Volatility (6M) Calculated over the trailing 6-month period	77.49%	72.76%	+4.73%
Volatility (1Y) Calculated over the trailing 1-year period	111.73%	104.15%	+7.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	135.94%	159.55%	-23.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	135.94%	125.05%	+10.89%

Dividends

ARQQ vs. QMCO - Dividend Comparison

Neither ARQQ nor QMCO has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both ARQQ and QMCO in my portfolio?

ARQQ and QMCO have a correlation of 0.55, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ARQQ or QMCO?

ARQQ has higher volatility (52.32%) compared to QMCO (41.79%). In terms of maximum drawdown, ARQQ dropped -99.60% vs QMCO's -99.93%.

Which has better risk-adjusted returns?

QMCO currently has the higher Sharpe Ratio (0.66 vs -0.22), 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.