T vs. GLW
T (AT&T Inc.) and GLW (Corning Incorporated) are both stocks. T operates in Telecom Services (Communication Services), while GLW operates in Electronic Components (Technology). Over the past 10 years, T returned 2.10%/yr vs 24.75%/yr for GLW. At a 0.26 correlation, their price movements are largely independent.
Performance
T vs. GLW - Performance Comparison
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Returns By Period
In the year-to-date period, T achieves a -7.04% return, which is significantly lower than GLW's 75.45% return. Over the past 10 years, T has underperformed GLW with an annualized return of 2.10%, while GLW has yielded a comparatively higher 24.75% annualized return.
T
- 1D
- 0.64%
- 1M
- 2.62%
- 6M
- -2.84%
- YTD
- -7.04%
- 1Y
- -13.37%
- 3Y*
- 20.93%
- 5Y*
- 7.13%
- 10Y*
- 2.10%
- ALL TIME*
- 9.35%
GLW
- 1D
- -0.98%
- 1M
- -21.45%
- 6M
- 63.08%
- YTD
- 75.45%
- 1Y
- 186.56%
- 3Y*
- 70.31%
- 5Y*
- 33.64%
- 10Y*
- 24.75%
- ALL TIME*
- 10.35%
T vs. GLW - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
T AT&T Inc. | -7.04% | 13.97% | 44.08% | -2.74% | 5.76% | -8.09% | -21.37% | 45.55% | -22.25% | -4.01% |
GLW Corning Incorporated | 75.45% | 87.76% | 60.64% | -1.23% | -11.56% | 5.92% | 27.57% | -1.02% | -3.28% | 34.63% |
Correlation
The correlation between T and GLW is -0.26, 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 | -0.26 |
Correlation (3Y) Calculated over the trailing 3-year period | -0.05 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.13 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.23 |
Correlation (All Time) Calculated using the full available price history since Jul 19, 1984 | 0.26 |
The correlation between T and GLW shifts across timeframes, from -0.26 (1 year) to 0.26 (all time), reflecting how their relationship changes across market environments.
Fundamentals
T:
$152.52B
GLW:
$131.88B
T:
$3.05
GLW:
$2.10
T:
7.19
GLW:
72.82
T:
0.30
GLW:
1.77
T:
1.25
GLW:
8.08
T:
$125.65B
GLW:
$16.32B
T:
$105.41B
GLW:
$5.93B
T:
$54.70B
GLW:
$3.77B
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Return for Risk
T vs. GLW — Risk / Return Rank
T
GLW
T vs. GLW - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for AT&T Inc. (T) and Corning Incorporated (GLW). 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 | GLW | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -3.41 | ||
| Sortino ratioReturn per unit of downside risk | -3.75 | ||
| Omega ratioGain probability vs. loss probability | 0.92 | 1.42 | -0.50 |
| Calmar ratioReturn relative to maximum drawdown | -0.46 | 4.68 | -5.14 |
| Martin ratioReturn relative to average drawdown | -1.03 | 18.80 | -19.83 |
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Drawdowns
T vs. GLW - Drawdown Comparison
The maximum T drawdown since its inception was -64.15%, smaller than the maximum GLW drawdown of -99.02%. Use the drawdown chart below to compare losses from any high point for T and GLW.
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Drawdown Indicators
| T | GLW | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -64.15% | -99.02% | +34.87% |
Max Drawdown (1Y)Largest decline over 1 year | -28.89% | -40.12% | +11.23% |
Max Drawdown (3Y)Largest decline over 3 years | -28.89% | -40.12% | +11.23% |
Max Drawdown (5Y)Largest decline over 5 years | -32.01% | -40.12% | +8.11% |
Max Drawdown (10Y)Largest decline over 10 years | -42.35% | -48.80% | +6.45% |
Current DrawdownCurrent decline from peak | -21.57% | -40.12% | +18.55% |
Average DrawdownAverage peak-to-trough decline | -15.74% | -50.43% | +34.69% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 12.94% | 9.97% | +2.97% |
Volatility
T vs. GLW - Volatility Comparison
The current volatility for AT&T Inc. (T) is 9.59%, while Corning Incorporated (GLW) has a volatility of 34.70%. This indicates that T experiences smaller price fluctuations and is considered to be less risky than GLW based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| T | GLW | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 9.59% | 34.70% | -25.11% |
Volatility (6M)Calculated over the trailing 6-month period | 19.91% | 60.48% | -40.57% |
Volatility (1Y)Calculated over the trailing 1-year period | 23.72% | 66.21% | -42.49% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 24.38% | 38.95% | -14.57% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 23.92% | 35.53% | -11.61% |
Dividends
T vs. GLW - Dividend Comparison
T's dividend yield for the trailing twelve months is around 6.58%, more than GLW's 0.73% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
GLW Corning Incorporated | 0.73% | 1.28% | 2.36% | 3.68% | 3.38% | 2.58% | 2.44% | 2.75% | 2.38% | 1.94% | 2.22% | 2.63% |
T AT&T Inc. | 6.58% | 4.47% | 4.87% | 6.62% | 6.66% | 8.46% | 7.23% | 5.22% | 7.01% | 5.04% | 4.51% | 5.46% |
Financials
T vs. GLW - Financials Comparison
This section allows you to compare key financial metrics between AT&T Inc. and Corning Incorporated. You can select fields from income statements, balance sheets, and cash flow statements to easily visualize and compare the financial health of both companies.
Total Revenue: Total amount of money received from sales and other business activities
Frequently Asked Questions
T and GLW have a correlation of -0.26, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
GLW has higher volatility (34.70%) compared to T (9.59%). In terms of maximum drawdown, T dropped -64.15% vs GLW's -99.02%.
GLW currently has the higher Sharpe Ratio (2.84 vs -0.57), 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.
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