CER.L vs. FNX.L

Last updated Apr 4, 2026

Compare and contrast key facts about Cerillion plc (CER.L) and Fonix Mobile plc (FNX.L).

Performance

CER.L vs. FNX.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in Cerillion plc (CER.L) and Fonix Mobile plc (FNX.L). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CER.L achieves a 7.32% return, which is significantly higher than FNX.L's -5.22% return.

CER.L

• 1D: -1.14%
• 1M: -7.47%
• YTD: 7.32%
• 6M: -15.26%
• 1Y: -13.07%
• 3Y*: 5.89%
• 5Y*: 23.36%
• 10Y*: 30.49%

FNX.L

• 1D: -0.63%
• 1M: -0.18%
• YTD: -5.22%
• 6M: -18.45%
• 1Y: -11.90%
• 3Y*: -2.86%
• 5Y*: 2.19%
• 10Y*: —

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

CER.L vs. FNX.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
CER.L Cerillion plc	7.32%	-29.70%	10.46%	33.65%	37.13%	116.30%	32.95%
FNX.L Fonix Mobile plc	-5.22%	-17.94%	-9.66%	19.25%	35.58%	23.00%	42.86%

Correlation

The correlation between CER.L and FNX.L is 0.08, meaning there is essentially no relationship between their price movements. They neither move together nor in opposition — each responds to its own set of market drivers. This independence makes them strong candidates for combining in a diversified portfolio.

Fundamentals

Market Cap CER.L : £384.47M FNX.L : £156.06M
EPS CER.L : £1.08 FNX.L : £0.22
PE Ratio CER.L : 12.06 FNX.L : 7.02
PEG Ratio CER.L : 0.44 FNX.L : 0.42
PS Ratio CER.L : 4.31 FNX.L : 1.03
PB Ratio CER.L : 6.45 FNX.L : 14.36
Total Revenue (TTM) CER.L : £89.11M FNX.L : £151.55M
Gross Profit (TTM) CER.L : £67.58M FNX.L : £35.81M
EBITDA (TTM) CER.L : £46.30M FNX.L : £30.49M

Return for Risk

CER.L vs. FNX.L — Risk / Return Rank

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

CER.L

CER.L Risk / Return Rank: 28
CER.L Sharpe Ratio Rank: 27
CER.L Sortino Ratio Rank: 26
CER.L Omega Ratio Rank: 26
CER.L Calmar Ratio Rank: 31
CER.L Martin Ratio Rank: 30

FNX.L

FNX.L Risk / Return Rank: 25
FNX.L Sharpe Ratio Rank: 24
FNX.L Sortino Ratio Rank: 22
FNX.L Omega Ratio Rank: 22
FNX.L Calmar Ratio Rank: 29
FNX.L Martin Ratio Rank: 28

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.

CER.L vs. FNX.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Cerillion plc (CER.L) and Fonix Mobile plc (FNX.L). 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.

	CER.L	FNX.L	Difference
Sharpe ratio Return per unit of total volatility	-0.29	-0.37	+0.07
Sortino ratio Return per unit of downside risk	-0.10	-0.33	+0.23
Omega ratio Gain probability vs. loss probability	0.99	0.96	+0.02
Calmar ratio Return relative to maximum drawdown	-0.28	-0.33	+0.06
Martin ratio Return relative to average drawdown	-0.55	-0.66	+0.11
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CER.L vs. FNX.L - Sharpe Ratio Comparison

The current CER.L Sharpe Ratio is -0.29, which is comparable to the FNX.L Sharpe Ratio of -0.37. The chart below compares the historical Sharpe Ratios of CER.L and FNX.L, 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

	CER.L	FNX.L	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.29	-0.37	+0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.06	+0.54
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.97	0.36	+0.62

Drawdowns

CER.L vs. FNX.L - Drawdown Comparison

The maximum CER.L drawdown since its inception was -47.28%, which is greater than FNX.L's maximum drawdown of -42.59%. Use the drawdown chart below to compare losses from any high point for CER.L and FNX.L.

Drawdown Indicators

	CER.L	FNX.L	Difference
Max Drawdown Largest peak-to-trough decline	-47.28%	-42.59%	-4.69%
Max Drawdown (1Y) Largest decline over 1 year	-47.28%	-35.82%	-11.46%
Max Drawdown (5Y) Largest decline over 5 years	-47.28%	-42.59%	-4.69%
Max Drawdown (10Y) Largest decline over 10 years	-47.28%	—	—
Current Drawdown Current decline from peak	-31.81%	-37.82%	+6.01%
Average Drawdown Average peak-to-trough decline	-10.24%	-14.08%	+3.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	23.70%	18.03%	+5.67%

Volatility

CER.L vs. FNX.L - Volatility Comparison

Cerillion plc (CER.L) has a higher volatility of 20.61% compared to Fonix Mobile plc (FNX.L) at 12.42%. This indicates that CER.L's price experiences larger fluctuations and is considered to be riskier than FNX.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CER.L	FNX.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	20.61%	12.42%	+8.19%
Volatility (6M) Calculated over the trailing 6-month period	33.64%	26.33%	+7.31%
Volatility (1Y) Calculated over the trailing 1-year period	49.02%	34.78%	+14.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	39.15%	36.78%	+2.37%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	37.41%	37.91%	-0.50%

Dividends

CER.L vs. FNX.L - Dividend Comparison

CER.L's dividend yield for the trailing twelve months is around 1.18%, less than FNX.L's 5.75% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
CER.L Cerillion plc	1.18%	1.15%	1.28%	0.70%	0.75%	0.80%	2.12%	1.92%	3.15%	2.73%	2.82%
FNX.L Fonix Mobile plc	5.75%	7.00%	3.81%	2.90%	2.99%	3.14%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

CER.L vs. FNX.L - Profitability Comparison

The chart below illustrates the profitability comparison between Cerillion plc and Fonix Mobile plc over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

CER.L - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Cerillion plc reported a gross profit of 18.94M and revenue of 24.44M. Therefore, the gross margin over that period was 77.5%.

FNX.L - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Fonix Mobile plc reported a gross profit of 9.94M and revenue of 42.33M. Therefore, the gross margin over that period was 23.5%.

CER.L - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Cerillion plc reported an operating income of 11.60M and revenue of 24.44M, resulting in an operating margin of 47.5%.

FNX.L - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Fonix Mobile plc reported an operating income of 7.63M and revenue of 42.33M, resulting in an operating margin of 18.0%.

CER.L - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Cerillion plc reported a net income of 9.58M and revenue of 24.44M, resulting in a net margin of 39.2%.

FNX.L - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Fonix Mobile plc reported a net income of 6.11M and revenue of 42.33M, resulting in a net margin of 14.4%.