T vs. CLS

Last updated Jun 13, 2026

T (AT&T Inc.) and CLS (Celestica Inc.) are both stocks. T operates in Telecom Services (Communication Services), while CLS operates in Electronic Components (Technology). Over the past 10 years, T returned 3.33%/yr vs 43.71%/yr for CLS. At a 0.20 correlation, their price movements are largely independent.

Performance

T vs. CLS - Performance Comparison

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

Returns By Period

In the year-to-date period, T achieves a -2.96% return, which is significantly lower than CLS's 32.99% return. Over the past 10 years, T has underperformed CLS with an annualized return of 3.33%, while CLS has yielded a comparatively higher 43.71% annualized return.

T

• 1D: 2.52%
• 1M: -4.69%
• YTD: -2.96%
• 6M: -1.93%
• 1Y: -12.96%
• 3Y*: 20.58%
• 5Y*: 7.38%
• 10Y*: 3.33%

CLS

• 1D: 1.88%
• 1M: 5.52%
• YTD: 32.99%
• 6M: 28.26%
• 1Y: 200.71%
• 3Y*: 207.28%
• 5Y*: 116.26%
• 10Y*: 43.71%

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

T vs. CLS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
T AT&T Inc.	-2.96%	13.97%	44.08%	-2.74%	5.76%	-8.09%	-21.37%	45.55%	-22.25%	-4.01%
CLS Celestica Inc.	32.99%	220.27%	215.23%	159.80%	1.26%	37.92%	-2.42%	-5.70%	-16.32%	-11.56%

Correlation

The correlation between T and CLS is -0.19, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.19
Correlation (3Y) Calculated over the trailing 3-year period	-0.11
Correlation (5Y) Calculated over the trailing 5-year period	0.04
Correlation (10Y) Calculated over the trailing 10-year period	0.14
Correlation (All Time) Calculated using the full available price history since Jun 30, 1998	0.20

The correlation between T and CLS shifts across timeframes, from -0.19 (1 year) to 0.20 (all time), reflecting how their relationship changes across market environments.

Fundamentals

EPS T : $3.04 CLS : $8.28
PE Ratio T : 7.74 CLS : 47.45
PEG Ratio T : 0.32 CLS : 0.64
PS Ratio T : 1.35 CLS : 3.30
Total Revenue (TTM) T : $125.65B CLS : $13.81B
Gross Profit (TTM) T : $105.41B CLS : $1.60B
EBITDA (TTM) T : $54.70B CLS : $1.32B

Return for Risk

T vs. CLS — Risk / Return Rank

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

T

T Risk / Return Rank: 18
T Sharpe Ratio Rank: 17
T Sortino Ratio Rank: 17
T Omega Ratio Rank: 18
T Calmar Ratio Rank: 21
T Martin Ratio Rank: 15

CLS

CLS Risk / Return Rank: 92
CLS Sharpe Ratio Rank: 95
CLS Sortino Ratio Rank: 88
CLS Omega Ratio Rank: 88
CLS Calmar Ratio Rank: 96
CLS Martin Ratio Rank: 95

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.

T vs. CLS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AT&T Inc. (T) and Celestica Inc. (CLS). 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.

	T	CLS	Difference
Sharpe ratio: Return per unit of total volatility	-0.59	2.78	-3.37
Sortino ratio: Return per unit of downside risk	-0.72	2.81	-3.53
Omega ratio: Gain probability vs. loss probability	0.92	1.37	-0.45
Calmar ratio: Return relative to maximum drawdown	-0.59	6.91	-7.51
Martin ratio: Return relative to average drawdown	-1.22	16.83	-18.05

T vs. CLS - Sharpe Ratio Comparison

The current T Sharpe Ratio is -0.59, which is lower than the CLS Sharpe Ratio of 2.78. The chart below compares the historical Sharpe Ratios of T and CLS, 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

T vs. CLS - Drawdown Comparison

The maximum T drawdown since its inception was -64.15%, smaller than the maximum CLS drawdown of -96.93%. Use the drawdown chart below to compare losses from any high point for T and CLS.

Drawdown Indicators

	T	CLS	Difference
Max Drawdown Largest peak-to-trough decline	-64.15%	-96.93%	+32.78%
Max Drawdown (1Y) Largest decline over 1 year	-21.87%	-29.24%	+7.37%
Max Drawdown (3Y) Largest decline over 3 years	-21.87%	-53.96%	+32.09%
Max Drawdown (5Y) Largest decline over 5 years	-32.01%	-53.96%	+21.95%
Max Drawdown (10Y) Largest decline over 10 years	-42.35%	-80.60%	+38.25%
Current Drawdown Current decline from peak	-18.12%	-16.78%	-1.34%
Average Drawdown Average peak-to-trough decline	-15.72%	-73.31%	+57.59%
Ulcer Index Depth and duration of drawdowns from previous peaks	10.64%	11.98%	-1.34%

Volatility

T vs. CLS - Volatility Comparison

The current volatility for AT&T Inc. (T) is 8.21%, while Celestica Inc. (CLS) has a volatility of 27.54%. This indicates that T experiences smaller price fluctuations and is considered to be less risky than CLS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	T	CLS	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.21%	27.54%	-19.33%
Volatility (6M) Calculated over the trailing 6-month period	17.80%	55.42%	-37.62%
Volatility (1Y) Calculated over the trailing 1-year period	22.13%	72.65%	-50.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.01%	57.70%	-33.69%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.73%	49.97%	-26.24%

Dividends

T vs. CLS - Dividend Comparison

T's dividend yield for the trailing twelve months is around 4.71%, while CLS has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CLS Celestica Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
T AT&T Inc.	4.71%	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 T and CLS in my portfolio?

T and CLS have a correlation of -0.19, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, T or CLS?

CLS has higher volatility (27.54%) compared to T (8.21%). In terms of maximum drawdown, T dropped -64.15% vs CLS's -96.93%.

Which has better risk-adjusted returns?

CLS currently has the higher Sharpe Ratio (2.78 vs -0.59), 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.