Corning (XTER:GLW) Quality Rank

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

XTER:GLW Corning Inc XTER:GLW
71 GF Score
Price €166.16
GF Value €54.24
Valuation Significantly Overvalued
! 2 Warning Signs
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What is Corning Quality Rank?

The Quality Rank measures the business quality of a company relative to other companies. It is ranked based on the strength of the balance sheet, as well as the profitability and growth of the business. The ranked companies are split in equal numbers and then ranked from 1 to 10, with 10 being the highest.

The rank of balance sheet (30%)

The rank of balance sheet is done through the ranking of:
  • Interest coverage
  • Zscore
  • Debt to revenue
  • Equity to asset
  • Cash to debt

The rank of Profitability (70%)

The ranking of Profitability is done by ranking:
  • Operating margin mean rank (10-year mean average profit margine)
  • Operating margin growth rank
  • Fscore
  • Predictability rank
  • Revenue growth rank (5 year), when the growth is higher than 25%, set it as 25%
  • Num of year profit (number of years that is profitable within the last 10 years)
  • ROIC median (10-year median of ROIC)

Corning Quality Rank Related Terms

XTER:GLW
71GF Score
Corning Inc XTER:GLW
Quality Rank is just one metric. See GF Score™, valuation, warning signs, and more.
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Is Corning (XTER:GLW) Overvalued in 2026?

Based on GuruFocus' analysis, Corning stock appears to be overvalued. The current stock price of €166.16 is trading 206.3% above its estimated GF Value™ of €54.24. GuruFocus considers Corning to be Significantly Overvalued.

Key valuation signals for XTER:GLW:

  • Quality Rank:
  • GF Value™: €54.24 vs. price of €166.16 (206.3% above fair value)
  • GF Score™: 71/100 with 2 warning signs

No single metric tells the full story. See the XTER:GLW stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

Corning Business Description

Address One Riverfront Plaza, Corning, NY, USA, 14831
Corning is a provider of glass, ceramics, and optical fiber across six distinct end markets. Corning's largest segments by revenue are display glass for TVs and optical fiber for telecom networks and data centers. It also provides cover glass for smartphones as well as filters and substrates and glass for cars, produces pharmaceutical glass, and produces polysilicon for solar panels. Corning is a US producer and is vertically integrated across its products and markets.
71GF Score

Get the complete analysis for XTER:GLW

Quality Rank is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€166.16
Price
€54.24
GF Value