CLS vs. T

Last updated Jun 9, 2026

CLS (Celestica Inc.) and T (AT&T Inc.) are both stocks. CLS operates in Electronic Components (Technology), while T operates in Telecom Services (Communication Services). Over the past 10 years, CLS returned 43.16%/yr vs 2.86%/yr for T. At a 0.20 correlation, their price movements are largely independent.

Performance

CLS vs. T - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Celestica Inc. (CLS) 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, CLS achieves a 30.75% return, which is significantly higher than T's -7.40% return. Over the past 10 years, CLS has outperformed T with an annualized return of 43.16%, while T has yielded a comparatively lower 2.86% annualized return.

CLS

• 1D: 3.98%
• 1M: 2.92%
• YTD: 30.75%
• 6M: 13.42%
• 1Y: 220.14%
• 3Y*: 209.55%
• 5Y*: 114.81%
• 10Y*: 43.16%

T

• 1D: -1.10%
• 1M: -10.57%
• YTD: -7.40%
• 6M: -7.40%
• 1Y: -16.38%
• 3Y*: 18.39%
• 5Y*: 6.60%
• 10Y*: 2.86%

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

CLS vs. T - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CLS Celestica Inc.	30.75%	220.27%	215.23%	159.80%	1.26%	37.92%	-2.42%	-5.70%	-16.32%	-11.56%
T AT&T Inc.	-7.40%	13.97%	44.08%	-2.74%	5.76%	-8.09%	-21.37%	45.55%	-22.25%	-4.01%

Correlation

The correlation between CLS and T is -0.18, 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	-0.18
Correlation (3Y) Calculated over the trailing 3-year period	-0.11
Correlation (5Y) Calculated over the trailing 5-year period	0.05
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 CLS and T shifts across timeframes, from -0.18 (1 year) to 0.20 (all time), reflecting how their relationship changes across market environments.

Fundamentals

EPS CLS : $8.28 T : $3.04
PE Ratio CLS : 46.65 T : 7.39
PEG Ratio CLS : 0.63 T : 0.31
PS Ratio CLS : 3.24 T : 1.29
Total Revenue (TTM) CLS : $13.81B T : $125.65B
Gross Profit (TTM) CLS : $1.60B T : $105.41B
EBITDA (TTM) CLS : $1.32B T : $54.70B

Return for Risk

CLS vs. T — Risk / Return Rank

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

CLS

CLS Risk / Return Rank: 93
CLS Sharpe Ratio Rank: 95
CLS Sortino Ratio Rank: 89
CLS Omega Ratio Rank: 88
CLS Calmar Ratio Rank: 96
CLS Martin Ratio Rank: 95

T

T Risk / Return Rank: 11
T Sharpe Ratio Rank: 11
T Sortino Ratio Rank: 12
T Omega Ratio Rank: 13
T Calmar Ratio Rank: 14
T Martin Ratio Rank: 4

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.

CLS vs. T - Risk-Adjusted Trends Comparison

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

	CLS	T	Difference
Sharpe ratio: Return per unit of total volatility	3.06	-0.75	+3.81
Sortino ratio: Return per unit of downside risk	2.94	-0.98	+3.92
Omega ratio: Gain probability vs. loss probability	1.39	0.89	+0.51
Calmar ratio: Return relative to maximum drawdown	7.58	-0.75	+8.33
Martin ratio: Return relative to average drawdown	18.88	-1.59	+20.47
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CLS vs. T - Sharpe Ratio Comparison

The current CLS Sharpe Ratio is 3.06, which is higher than the T Sharpe Ratio of -0.75. The chart below compares the historical Sharpe Ratios of CLS 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

	CLS	T	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.06	-0.75	+3.81
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	2.01	0.28	+1.73
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.87	0.12	+0.75
Sharpe Ratio (All Time) Calculated using the full available price history	0.27	0.38	-0.11

Drawdowns

CLS vs. T - Drawdown Comparison

The maximum CLS drawdown since its inception was -96.93%, which is greater than T's maximum drawdown of -64.15%. Use the drawdown chart below to compare losses from any high point for CLS and T.

Drawdown Indicators

	CLS	T	Difference
Max Drawdown Largest peak-to-trough decline	-96.93%	-64.15%	-32.78%
Max Drawdown (1Y) Largest decline over 1 year	-29.24%	-21.87%	-7.37%
Max Drawdown (3Y) Largest decline over 3 years	-53.96%	-21.87%	-32.09%
Max Drawdown (5Y) Largest decline over 5 years	-53.96%	-32.01%	-21.95%
Max Drawdown (10Y) Largest decline over 10 years	-80.60%	-42.35%	-38.25%
Current Drawdown Current decline from peak	-18.18%	-21.87%	+3.69%
Average Drawdown Average peak-to-trough decline	-73.36%	-15.72%	-57.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	11.72%	10.34%	+1.38%

Volatility

CLS vs. T - Volatility Comparison

Celestica Inc. (CLS) has a higher volatility of 26.60% compared to AT&T Inc. (T) at 7.50%. This indicates that CLS'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

	CLS	T	Difference
Volatility (1M) Calculated over the trailing 1-month period	26.60%	7.50%	+19.10%
Volatility (6M) Calculated over the trailing 6-month period	55.08%	17.57%	+37.51%
Volatility (1Y) Calculated over the trailing 1-year period	72.52%	21.98%	+50.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	57.62%	23.97%	+33.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	49.93%	23.71%	+26.22%

Dividends

CLS vs. T - Dividend Comparison

CLS has not paid dividends to shareholders, while T's dividend yield for the trailing twelve months is around 4.93%.

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.	4.93%	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 CLS and T in my portfolio?

CLS and T have a correlation of -0.18, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CLS or T?

CLS has higher volatility (26.60%) compared to T (7.50%). In terms of maximum drawdown, CLS dropped -96.93% vs T's -64.15%.

Which has better risk-adjusted returns?

CLS currently has the higher Sharpe Ratio (3.06 vs -0.75), 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.