QUBT vs. ARQQ

Last updated Jun 4, 2026

QUBT (Quantum Computing, Inc.) and ARQQ (Arqit Quantum Inc.) are both stocks. Both are in the Technology sector — QUBT in Computer Hardware, ARQQ in Software - Infrastructure. Over the past 3 years, QUBT returned 109.96%/yr vs -22.54%/yr for ARQQ. At a 0.39 correlation, their price movements are largely independent.

Performance

QUBT vs. ARQQ - Performance Comparison

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

Returns By Period

In the year-to-date period, QUBT achieves a 9.16% return, which is significantly higher than ARQQ's -33.09% return.

QUBT

• 1D: -8.57%
• 1M: 17.89%
• YTD: 9.16%
• 6M: -7.21%
• 1Y: -9.68%
• 3Y*: 109.96%
• 5Y*: 14.83%
• 10Y*: —

ARQQ

• 1D: -10.02%
• 1M: 1.53%
• YTD: -33.09%
• 6M: -50.44%
• 1Y: -37.97%
• 3Y*: -22.54%
• 5Y*: —
• 10Y*: —

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

QUBT vs. ARQQ - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
QUBT Quantum Computing, Inc.	9.16%	-38.01%	1,712.51%	-39.53%	-55.72%	-50.29%
ARQQ Arqit Quantum Inc.	-33.09%	-43.67%	227.76%	-86.87%	-84.93%	111.95%

Correlation

The correlation between QUBT and ARQQ is 0.67, 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	0.67
Correlation (3Y) Calculated over the trailing 3-year period	0.51
Correlation (All Time) Calculated using the full available price history since Sep 8, 2021	0.39

Over the past year, QUBT and ARQQ have become more correlated (0.67) than their long-term average of 0.39, meaning their price movements have been converging.

Fundamentals

Market Cap QUBT : $2.51B ARQQ : $242.74M
EPS QUBT : -$0.21 ARQQ : -$4.72
PS Ratio QUBT : 483.43 ARQQ : 163.38
PB Ratio QUBT : 1.57 ARQQ : 8.52
Total Revenue (TTM) QUBT : $4.33M ARQQ : $1.43M
Gross Profit (TTM) QUBT : -$667.00K ARQQ : -$307.00K
EBITDA (TTM) QUBT : -$52.52M ARQQ : -$68.30M

Return for Risk

QUBT vs. ARQQ — Risk / Return Rank

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

QUBT

QUBT Risk / Return Rank: 40
QUBT Sharpe Ratio Rank: 37
QUBT Sortino Ratio Rank: 46
QUBT Omega Ratio Rank: 43
QUBT Calmar Ratio Rank: 36
QUBT Martin Ratio Rank: 36

ARQQ

ARQQ Risk / Return Rank: 28
ARQQ Sharpe Ratio Rank: 25
ARQQ Sortino Ratio Rank: 32
ARQQ Omega Ratio Rank: 31
ARQQ Calmar Ratio Rank: 24
ARQQ Martin Ratio Rank: 27

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.

QUBT vs. ARQQ - Risk-Adjusted Trends Comparison

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

	QUBT	ARQQ	Difference
Sharpe ratio Return per unit of total volatility	-0.09	-0.36	+0.27
Sortino ratio Return per unit of downside risk	0.71	0.10	+0.61
Omega ratio Gain probability vs. loss probability	1.07	1.01	+0.06
Calmar ratio Return relative to maximum drawdown	-0.13	-0.48	+0.35
Martin ratio Return relative to average drawdown	-0.20	-0.73	+0.52
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

QUBT vs. ARQQ - Sharpe Ratio Comparison

The current QUBT Sharpe Ratio is -0.09, which is higher than the ARQQ Sharpe Ratio of -0.36. The chart below compares the historical Sharpe Ratios of QUBT and ARQQ, 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

	QUBT	ARQQ	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.09	-0.36	+0.27
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.11	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.06	-0.35	+0.41

Drawdowns

QUBT vs. ARQQ - Drawdown Comparison

The maximum QUBT drawdown since its inception was -97.53%, roughly equal to the maximum ARQQ drawdown of -99.60%. Use the drawdown chart below to compare losses from any high point for QUBT and ARQQ.

Drawdown Indicators

	QUBT	ARQQ	Difference
Max Drawdown Largest peak-to-trough decline	-97.53%	-99.60%	+2.07%
Max Drawdown (1Y) Largest decline over 1 year	-74.37%	-79.78%	+5.41%
Max Drawdown (3Y) Largest decline over 3 years	-82.40%	-90.47%	+8.07%
Max Drawdown (5Y) Largest decline over 5 years	-95.63%	—	—
Current Drawdown Current decline from peak	-56.39%	-98.46%	+42.07%
Average Drawdown Average peak-to-trough decline	-72.99%	-88.80%	+15.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	47.68%	52.22%	-4.54%

Volatility

QUBT vs. ARQQ - Volatility Comparison

Quantum Computing, Inc. (QUBT) has a higher volatility of 36.08% compared to Arqit Quantum Inc. (ARQQ) at 31.86%. This indicates that QUBT's price experiences larger fluctuations and is considered to be riskier than ARQQ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	QUBT	ARQQ	Difference
Volatility (1M) Calculated over the trailing 1-month period	36.08%	31.86%	+4.22%
Volatility (6M) Calculated over the trailing 6-month period	67.55%	63.00%	+4.55%
Volatility (1Y) Calculated over the trailing 1-year period	107.57%	105.68%	+1.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	133.11%	133.95%	-0.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	177.77%	133.95%	+43.82%

Dividends

QUBT vs. ARQQ - Dividend Comparison

Neither QUBT nor ARQQ has paid dividends to shareholders.

Tickers have no history of dividend payments

Financials

Frequently Asked Questions

Can I hold both QUBT and ARQQ in my portfolio?

QUBT and ARQQ have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, QUBT or ARQQ?

QUBT has higher volatility (36.08%) compared to ARQQ (31.86%). In terms of maximum drawdown, QUBT dropped -97.53% vs ARQQ's -99.60%.

Which has better risk-adjusted returns?

QUBT currently has the higher Sharpe Ratio (-0.09 vs -0.36), 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.