AAF.L vs. PROK

Last updated Jun 5, 2026

AAF.L (Airtel Africa plc) and PROK (ProKidney Corp.) are both stocks. AAF.L operates in Telecom Services (Communication Services), while PROK operates in Biotechnology (Healthcare). Over the past 3 years, AAF.L returned 43.77%/yr vs -47.91%/yr for PROK. At a 0.09 correlation, their price movements are largely independent.

Performance

AAF.L vs. PROK - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in Airtel Africa plc (AAF.L) and ProKidney Corp. (PROK). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

AAF.L is traded in GBp, while PROK is traded in USD. To make them comparable, the PROK values have been converted to GBp using the latest available exchange rates.

Returns By Period

In the year-to-date period, AAF.L achieves a -4.00% return, which is significantly higher than PROK's -17.08% return.

AAF.L

• 1D: 1.49%
• 1M: -4.43%
• YTD: -4.00%
• 6M: 8.53%
• 1Y: 88.88%
• 3Y*: 43.77%
• 5Y*: 37.61%
• 10Y*: —

PROK

• 1D: 6.94%
• 1M: -2.76%
• YTD: -17.08%
• 6M: -28.51%
• 1Y: 136.75%
• 3Y*: -47.91%
• 5Y*: —
• 10Y*: —

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

AAF.L vs. PROK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
AAF.L Airtel Africa plc	-4.00%	218.32%	-9.69%	20.11%	-24.21%
PROK ProKidney Corp.	-17.08%	23.10%	-3.40%	-75.35%	-21.88%

Correlation

The correlation between AAF.L and PROK 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	0.10
Correlation (All Time) Calculated using the full available price history since Jul 13, 2022	0.09

Fundamentals

Market Cap AAF.L : £12.44B PROK : $262.56B
EPS AAF.L : £0.18 PROK : -$0.00
PS Ratio AAF.L : 1.95 PROK : 74.04K
PB Ratio AAF.L : 3.95 PROK : 997.94
Total Revenue (TTM) AAF.L : £6.37B PROK : $889.00K
Gross Profit (TTM) AAF.L : £3.93B PROK : -$2.18M
EBITDA (TTM) AAF.L : £2.98B PROK : -$112.46M

Return for Risk

AAF.L vs. PROK — Risk / Return Rank

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

AAF.L

AAF.L Risk / Return Rank: 88
AAF.L Sharpe Ratio Rank: 89
AAF.L Sortino Ratio Rank: 86
AAF.L Omega Ratio Rank: 88
AAF.L Calmar Ratio Rank: 85
AAF.L Martin Ratio Rank: 91

PROK

PROK Risk / Return Rank: 77
PROK Sharpe Ratio Rank: 51
PROK Sortino Ratio Rank: 99
PROK Omega Ratio Rank: 98
PROK Calmar Ratio Rank: 74
PROK Martin Ratio Rank: 64

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.

AAF.L vs. PROK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Airtel Africa plc (AAF.L) and ProKidney Corp. (PROK). 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.

	AAF.L	PROK	Difference
Sharpe ratio: Return per unit of total volatility	2.12	0.26	+1.86
Sortino ratio: Return per unit of downside risk	2.82	6.93	-4.10
Omega ratio: Gain probability vs. loss probability	1.41	1.79	-0.39
Calmar ratio: Return relative to maximum drawdown	3.46	1.97	+1.48
Martin ratio: Return relative to average drawdown	13.14	2.61	+10.53
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AAF.L vs. PROK - Sharpe Ratio Comparison

The current AAF.L Sharpe Ratio is 2.12, which is higher than the PROK Sharpe Ratio of 0.26. The chart below compares the historical Sharpe Ratios of AAF.L and PROK, 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

	AAF.L	PROK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.12	0.26	+1.86
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.06	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	-0.12	+0.77

Drawdowns

AAF.L vs. PROK - Drawdown Comparison

The maximum AAF.L drawdown since its inception was -65.78%, smaller than the maximum PROK drawdown of -96.46%. Use the drawdown chart below to compare losses from any high point for AAF.L and PROK.

Drawdown Indicators

	AAF.L	PROK	Difference
Max Drawdown Largest peak-to-trough decline	-65.78%	-96.46%	+30.68%
Max Drawdown (1Y) Largest decline over 1 year	-25.56%	-69.67%	+44.11%
Max Drawdown (3Y) Largest decline over 3 years	-31.08%	-96.09%	+65.01%
Max Drawdown (5Y) Largest decline over 5 years	-44.52%	—	—
Current Drawdown Current decline from peak	-18.85%	-87.81%	+68.96%
Average Drawdown Average peak-to-trough decline	-18.26%	-65.88%	+47.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.71%	52.53%	-45.82%

Volatility

AAF.L vs. PROK - Volatility Comparison

Airtel Africa plc (AAF.L) has a higher volatility of 26.04% compared to ProKidney Corp. (PROK) at 19.49%. This indicates that AAF.L's price experiences larger fluctuations and is considered to be riskier than PROK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AAF.L	PROK	Difference
Volatility (1M) Calculated over the trailing 1-month period	26.04%	19.49%	+6.55%
Volatility (6M) Calculated over the trailing 6-month period	33.47%	50.80%	-17.33%
Volatility (1Y) Calculated over the trailing 1-year period	41.71%	526.28%	-484.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	35.44%	284.79%	-249.35%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	46.23%	284.79%	-238.56%

Dividends

AAF.L vs. PROK - Dividend Comparison

AAF.L's dividend yield for the trailing twelve months is around 1.12%, while PROK has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019
AAF.L Airtel Africa plc	1.12%	1.07%	3.31%	2.76%	3.21%	1.80%	3.71%	2.26%
PROK ProKidney Corp.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

Frequently Asked Questions

Can I hold both AAF.L and PROK in my portfolio?

AAF.L and PROK 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.