GLW vs. T
GLW (Corning Incorporated) and T (AT&T Inc.) are both stocks. GLW operates in Electronic Components (Technology), while T operates in Telecom Services (Communication Services). Over the past 10 years, GLW returned 24.75%/yr vs 2.10%/yr for T. At a 0.26 correlation, their price movements are largely independent.
Performance
GLW vs. T - Performance Comparison
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Returns By Period
In the year-to-date period, GLW achieves a 75.45% return, which is significantly higher than T's -7.04% return. Over the past 10 years, GLW has outperformed T with an annualized return of 24.75%, while T has yielded a comparatively lower 2.10% annualized return.
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
- 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 vs. T - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
GLW Corning Incorporated | 75.45% | 87.76% | 60.64% | -1.23% | -11.56% | 5.92% | 27.57% | -1.02% | -3.28% | 34.63% |
T AT&T Inc. | -7.04% | 13.97% | 44.08% | -2.74% | 5.76% | -8.09% | -21.37% | 45.55% | -22.25% | -4.01% |
Correlation
The correlation between GLW and T 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 GLW and T shifts across timeframes, from -0.26 (1 year) to 0.26 (all time), reflecting how their relationship changes across market environments.
Fundamentals
GLW:
$131.88B
T:
$152.52B
GLW:
$2.10
T:
$3.05
GLW:
72.82
T:
7.19
GLW:
1.77
T:
0.30
GLW:
8.08
T:
1.25
GLW:
$16.32B
T:
$125.65B
GLW:
$5.93B
T:
$105.41B
GLW:
$3.77B
T:
$54.70B
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Return for Risk
GLW vs. T — Risk / Return Rank
GLW
T
GLW vs. T - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Corning Incorporated (GLW) 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.
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.
| GLW | T | 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 | 1.42 | 0.92 | +0.50 |
| Calmar ratioReturn relative to maximum drawdown | 4.68 | -0.46 | +5.14 |
| Martin ratioReturn relative to average drawdown | 18.80 | -1.03 | +19.83 |
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Drawdowns
GLW vs. T - Drawdown Comparison
The maximum GLW drawdown since its inception was -99.02%, which is greater than T's maximum drawdown of -64.15%. Use the drawdown chart below to compare losses from any high point for GLW and T.
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Drawdown Indicators
| GLW | T | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -99.02% | -64.15% | -34.87% |
Max Drawdown (1Y)Largest decline over 1 year | -40.12% | -28.89% | -11.23% |
Max Drawdown (3Y)Largest decline over 3 years | -40.12% | -28.89% | -11.23% |
Max Drawdown (5Y)Largest decline over 5 years | -40.12% | -32.01% | -8.11% |
Max Drawdown (10Y)Largest decline over 10 years | -48.80% | -42.35% | -6.45% |
Current DrawdownCurrent decline from peak | -40.12% | -21.57% | -18.55% |
Average DrawdownAverage peak-to-trough decline | -50.43% | -15.74% | -34.69% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 9.97% | 12.94% | -2.97% |
Volatility
GLW vs. T - Volatility Comparison
Corning Incorporated (GLW) has a higher volatility of 34.70% compared to AT&T Inc. (T) at 9.59%. This indicates that GLW'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.
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Volatility by Period
| GLW | T | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 34.70% | 9.59% | +25.11% |
Volatility (6M)Calculated over the trailing 6-month period | 60.48% | 19.91% | +40.57% |
Volatility (1Y)Calculated over the trailing 1-year period | 66.21% | 23.72% | +42.49% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 38.95% | 24.38% | +14.57% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 35.53% | 23.92% | +11.61% |
Dividends
GLW vs. T - Dividend Comparison
GLW's dividend yield for the trailing twelve months is around 0.73%, less than T's 6.58% 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
GLW vs. T - Financials Comparison
This section allows you to compare key financial metrics between Corning Incorporated and AT&T Inc.. 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
GLW and T 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, GLW dropped -99.02% vs T's -64.15%.
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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