III.L vs. TMUS

Last updated Jun 16, 2026

III.L (3I Group plc) and TMUS (T-Mobile US, Inc.) are both stocks. III.L operates in Investment Banking & Investment Services (Financial Services), while TMUS operates in Telecom Services (Communication Services). Over the past 10 years, III.L returned 19.43%/yr vs 17.61%/yr for TMUS. At a 0.16 correlation, their price movements are largely independent.

Performance

III.L vs. TMUS - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in 3I Group plc (III.L) and T-Mobile US, Inc. (TMUS). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

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

Returns By Period

In the year-to-date period, III.L achieves a -29.97% return, which is significantly lower than TMUS's -5.61% return. Over the past 10 years, III.L has outperformed TMUS with an annualized return of 19.43%, while TMUS has yielded a comparatively lower 17.61% annualized return.

III.L

• 1D: -1.04%
• 1M: 3.39%
• YTD: -29.97%
• 6M: -27.58%
• 1Y: -43.37%
• 3Y*: 7.13%
• 5Y*: 15.89%
• 10Y*: 19.43%

TMUS

• 1D: -0.20%
• 1M: 1.82%
• YTD: -5.61%
• 6M: -3.00%
• 1Y: -14.61%
• 3Y*: 12.99%
• 5Y*: 7.28%
• 10Y*: 17.61%

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

III.L vs. TMUS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
III.L 3I Group plc	-29.97%	-6.44%	50.11%	85.46%	-3.46%	28.99%	9.36%	47.12%	-11.76%	33.70%
TMUS T-Mobile US, Inc.	-5.61%	-13.23%	42.14%	9.27%	35.06%	-13.18%	66.91%	18.59%	6.10%	0.88%

Correlation

The correlation between III.L and TMUS is -0.01, 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	-0.01
Correlation (3Y) Calculated over the trailing 3-year period	0.03
Correlation (5Y) Calculated over the trailing 5-year period	0.03
Correlation (10Y) Calculated over the trailing 10-year period	0.11
Correlation (All Time) Calculated using the full available price history since Jul 13, 2007	0.16

The correlation between III.L and TMUS shifts across timeframes, from -0.01 (1 year) to 0.16 (all time), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap III.L : £23.26B TMUS : $208.13B
EPS III.L : £10.41 TMUS : $9.41
PE Ratio III.L : 2.20 TMUS : 20.07
PEG Ratio III.L : 0.27 TMUS : 0.30
PS Ratio III.L : 10.70 TMUS : 2.34
PB Ratio III.L : 0.75 TMUS : 3.72
Total Revenue (TTM) III.L : £2.12B TMUS : $90.53B
Gross Profit (TTM) III.L : £5.57B TMUS : $34.92B
EBITDA (TTM) III.L : £9.82B TMUS : $28.22B

Return for Risk

III.L vs. TMUS — Risk / Return Rank

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

III.L

III.L Risk / Return Rank: 7
III.L Sharpe Ratio Rank: 5
III.L Sortino Ratio Rank: 8
III.L Omega Ratio Rank: 6
III.L Calmar Ratio Rank: 11
III.L Martin Ratio Rank: 4

TMUS

TMUS Risk / Return Rank: 19
TMUS Sharpe Ratio Rank: 15
TMUS Sortino Ratio Rank: 16
TMUS Omega Ratio Rank: 17
TMUS Calmar Ratio Rank: 24
TMUS Martin Ratio Rank: 25

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.

III.L vs. TMUS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for 3I Group plc (III.L) and T-Mobile US, Inc. (TMUS). 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.

	III.L	TMUS	Difference
Sharpe ratio: Return per unit of total volatility	-1.00	-0.56	-0.44
Sortino ratio: Return per unit of downside risk	-1.32	-0.68	-0.64
Omega ratio: Gain probability vs. loss probability	0.80	0.92	-0.12
Calmar ratio: Return relative to maximum drawdown	-0.82	-0.49	-0.33
Martin ratio: Return relative to average drawdown	-1.61	-0.82	-0.78

III.L vs. TMUS - Sharpe Ratio Comparison

The current III.L Sharpe Ratio is -1.00, which is lower than the TMUS Sharpe Ratio of -0.56. The chart below compares the historical Sharpe Ratios of III.L and TMUS, 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

III.L vs. TMUS - Drawdown Comparison

The maximum III.L drawdown since its inception was -84.90%, roughly equal to the maximum TMUS drawdown of -82.61%. Use the drawdown chart below to compare losses from any high point for III.L and TMUS.

Drawdown Indicators

	III.L	TMUS	Difference
Max Drawdown Largest peak-to-trough decline	-84.90%	-82.61%	-2.29%
Max Drawdown (1Y) Largest decline over 1 year	-52.78%	-30.20%	-22.58%
Max Drawdown (3Y) Largest decline over 3 years	-52.78%	-37.22%	-15.56%
Max Drawdown (5Y) Largest decline over 5 years	-52.78%	-37.22%	-15.56%
Max Drawdown (10Y) Largest decline over 10 years	-52.78%	-37.22%	-15.56%
Current Drawdown Current decline from peak	-48.17%	-32.98%	-15.19%
Average Drawdown Average peak-to-trough decline	-23.09%	-24.62%	+1.53%
Ulcer Index Depth and duration of drawdowns from previous peaks	26.99%	17.76%	+9.23%

Volatility

III.L vs. TMUS - Volatility Comparison

3I Group plc (III.L) has a higher volatility of 12.83% compared to T-Mobile US, Inc. (TMUS) at 7.27%. This indicates that III.L's price experiences larger fluctuations and is considered to be riskier than TMUS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	III.L	TMUS	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.83%	7.27%	+5.56%
Volatility (6M) Calculated over the trailing 6-month period	37.16%	20.26%	+16.90%
Volatility (1Y) Calculated over the trailing 1-year period	43.41%	26.16%	+17.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	30.79%	24.17%	+6.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	30.35%	26.79%	+3.56%

Dividends

III.L vs. TMUS - Dividend Comparison

III.L's dividend yield for the trailing twelve months is around 3.46%, more than TMUS's 2.09% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
III.L 3I Group plc	3.46%	2.42%	1.82%	2.32%	3.76%	2.78%	3.02%	3.42%	4.78%	2.90%	3.41%	2.37%
TMUS T-Mobile US, Inc.	2.09%	1.80%	1.28%	0.41%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Financials

Frequently Asked Questions

Can I hold both III.L and TMUS in my portfolio?

III.L and TMUS have a correlation of -0.01, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.