SKM vs. T

Last updated Jun 3, 2026

SKM (SK Telecom Co.,Ltd) and T (AT&T Inc.) are both stocks. Both operate in the Telecom Services industry within the Communication Services sector. Over the past 10 years, SKM returned 11.97%/yr vs 4.09%/yr for T. At a 0.21 correlation, their price movements are largely independent.

Performance

SKM vs. T - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SK Telecom Co.,Ltd (SKM) and AT&T Inc. (T). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SKM achieves a 124.06% return, which is significantly higher than T's 1.40% return. Over the past 10 years, SKM has outperformed T with an annualized return of 11.97%, while T has yielded a comparatively lower 4.09% annualized return.

SKM

• 1D: 3.53%
• 1M: 24.32%
• YTD: 124.06%
• 6M: 129.43%
• 1Y: 125.84%
• 3Y*: 36.83%
• 5Y*: 13.35%
• 10Y*: 11.97%

T

• 1D: 0.37%
• 1M: -5.67%
• YTD: 1.40%
• 6M: -1.30%
• 1Y: -7.94%
• 3Y*: 23.97%
• 5Y*: 8.39%
• 10Y*: 4.09%

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

SKM vs. T - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SKM SK Telecom Co.,Ltd	124.06%	2.55%	2.85%	11.56%	-17.77%	14.59%	6.47%	-13.77%	-3.98%	34.06%
T AT&T Inc.	1.40%	13.97%	44.08%	-2.74%	5.76%	-8.09%	-21.37%	45.55%	-22.25%	-4.01%

Correlation

The correlation between SKM and T is 0.09, 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	0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.12
Correlation (5Y) Calculated over the trailing 5-year period	0.20
Correlation (10Y) Calculated over the trailing 10-year period	0.22
Correlation (All Time) Calculated using the full available price history since Jun 28, 1996	0.21

The correlation between SKM and T shifts across timeframes, from 0.09 (1 year) to 0.22 (10 years), reflecting how their relationship changes across market environments.

Fundamentals

EPS SKM : $115.81 T : $3.04
PE Ratio SKM : 0.40 T : 8.09
PS Ratio SKM : 0.00 T : 1.41
Total Revenue (TTM) SKM : $12.65T T : $125.65B
Gross Profit (TTM) SKM : $11.53T T : $105.41B
EBITDA (TTM) SKM : $3.16T T : $54.70B

Return for Risk

SKM vs. T — Risk / Return Rank

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

SKM

SKM Risk / Return Rank: 95
SKM Sharpe Ratio Rank: 95
SKM Sortino Ratio Rank: 96
SKM Omega Ratio Rank: 96
SKM Calmar Ratio Rank: 96
SKM Martin Ratio Rank: 92

T

T Risk / Return Rank: 24
T Sharpe Ratio Rank: 25
T Sortino Ratio Rank: 21
T Omega Ratio Rank: 22
T Calmar Ratio Rank: 29
T Martin Ratio Rank: 26

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.

SKM vs. T - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SK Telecom Co.,Ltd (SKM) and AT&T Inc. (T). 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.

	SKM	T	Difference
Sharpe ratio Return per unit of total volatility	3.25	-0.37	+3.62
Sortino ratio Return per unit of downside risk	4.46	-0.40	+4.86
Omega ratio Gain probability vs. loss probability	1.61	0.95	+0.66
Calmar ratio Return relative to maximum drawdown	7.94	-0.36	+8.31
Martin ratio Return relative to average drawdown	14.59	-0.75	+15.34
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SKM vs. T - Sharpe Ratio Comparison

The current SKM Sharpe Ratio is 3.25, which is higher than the T Sharpe Ratio of -0.37. The chart below compares the historical Sharpe Ratios of SKM and T, 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

	SKM	T	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.25	-0.37	+3.62
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	0.35	+0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.17	+0.29
Sharpe Ratio (All Time) Calculated using the full available price history	0.17	0.39	-0.22

Drawdowns

SKM vs. T - Drawdown Comparison

The maximum SKM drawdown since its inception was -74.42%, which is greater than T's maximum drawdown of -64.15%. Use the drawdown chart below to compare losses from any high point for SKM and T.

Drawdown Indicators

	SKM	T	Difference
Max Drawdown Largest peak-to-trough decline	-74.42%	-64.15%	-10.27%
Max Drawdown (1Y) Largest decline over 1 year	-16.03%	-20.60%	+4.57%
Max Drawdown (3Y) Largest decline over 3 years	-16.06%	-20.60%	+4.54%
Max Drawdown (5Y) Largest decline over 5 years	-37.77%	-32.01%	-5.76%
Max Drawdown (10Y) Largest decline over 10 years	-49.83%	-42.35%	-7.48%
Current Drawdown Current decline from peak	0.00%	-14.44%	+14.44%
Average Drawdown Average peak-to-trough decline	-36.19%	-15.72%	-20.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.73%	10.01%	-1.28%

Volatility

SKM vs. T - Volatility Comparison

SK Telecom Co.,Ltd (SKM) has a higher volatility of 21.06% compared to AT&T Inc. (T) at 5.53%. This indicates that SKM's price experiences larger fluctuations and is considered to be riskier than T based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SKM	T	Difference
Volatility (1M) Calculated over the trailing 1-month period	21.06%	5.53%	+15.53%
Volatility (6M) Calculated over the trailing 6-month period	35.01%	16.69%	+18.32%
Volatility (1Y) Calculated over the trailing 1-year period	38.92%	21.41%	+17.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.93%	23.85%	+3.08%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.91%	23.65%	+2.26%

Dividends

SKM vs. T - Dividend Comparison

SKM's dividend yield for the trailing twelve months is around 0.73%, less than T's 4.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SKM SK Telecom Co.,Ltd	0.73%	5.22%	4.76%	6.86%	6.81%	77.93%	0.38%	0.00%	0.00%	0.35%	4.68%	4.78%
T AT&T Inc.	4.50%	4.47%	4.87%	6.62%	6.66%	8.46%	7.23%	5.22%	7.01%	5.04%	4.51%	5.46%

Financials

Frequently Asked Questions

Can I hold both SKM and T in my portfolio?

SKM and T have a correlation of 0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SKM or T?

SKM has higher volatility (21.06%) compared to T (5.53%). In terms of maximum drawdown, SKM dropped -74.42% vs T's -64.15%.

Which has better risk-adjusted returns?

SKM currently has the higher Sharpe Ratio (3.25 vs -0.37), 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.