GFS vs UMC vs IMOS

For growth investors, ChipMOS TECHNOLOGIES Inc.

(IMOS) is the stronger pick with 6. 3% revenue growth year-over-year, versus 0. 6% for GLOBALFOUNDRIES Inc. (GFS). United Microelectronics Corporation (UMC) offers the better valuation at 28. 4x trailing P/E (22. 2x forward), making it the more compelling value choice. Analysts rate GLOBALFOUNDRIES Inc. (GFS) a "Buy" — based on 19 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, United Microelectronics Corporation (UMC) is the cheapest at 28.

4x versus ChipMOS TECHNOLOGIES Inc. at 48. 2x. On forward P/E, ChipMOS TECHNOLOGIES Inc. is actually cheaper at 0. 8x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: ChipMOS TECHNOLOGIES Inc. wins at 0. 01x versus United Microelectronics Corporation's 3. 05x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, ChipMOS TECHNOLOGIES Inc.

(IMOS) delivered a total return of +98. 5%, compared to +52. 9% for GLOBALFOUNDRIES Inc. (GFS). Over 10 years, the gap is even starker: UMC returned +895. 3% versus GFS's +52. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), United Microelectronics Corporation (UMC) is the lower-risk stock at 0.

90β versus GLOBALFOUNDRIES Inc. 's 1. 85β — meaning GFS is approximately 105% more volatile than UMC relative to the S&P 500. On balance sheet safety, GLOBALFOUNDRIES Inc. (GFS) carries a lower debt/equity ratio of 14% versus 61% for ChipMOS TECHNOLOGIES Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), ChipMOS TECHNOLOGIES Inc.

(IMOS) is pulling ahead at 6. 3% versus 0. 6% for GLOBALFOUNDRIES Inc. (GFS). On earnings-per-share growth, the picture is similar: GLOBALFOUNDRIES Inc. grew EPS 431. 3% year-over-year, compared to -25. 2% for ChipMOS TECHNOLOGIES Inc.. Over a 3-year CAGR, UMC leads at -5. 2% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

United Microelectronics Corporation (UMC) is the more profitable company, earning 17.

6% net margin versus 6. 3% for ChipMOS TECHNOLOGIES Inc. — meaning it keeps 17. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: UMC leads at 18. 5% versus 5. 6% for IMOS. At the gross margin level — before operating expenses — UMC leads at 29. 0%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, ChipMOS TECHNOLOGIES Inc. (IMOS) is the more undervalued stock at a PEG of 0. 01x versus United Microelectronics Corporation's 3. 05x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, ChipMOS TECHNOLOGIES Inc. (IMOS) trades at 0. 8x forward P/E versus 38. 5x for GLOBALFOUNDRIES Inc. — 37. 7x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for GFS: -27. 9% to $51. 14.

In this comparison, UMC (3.

0% yield), IMOS (1. 9% yield) pay a dividend. GFS does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, United Microelectronics Corporation (UMC) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

90), 3. 0% yield, +895. 3% 10Y return). GLOBALFOUNDRIES Inc. (GFS) carries a higher beta of 1. 85 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (UMC: +895. 3%, GFS: +52. 9%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: GFS is a mid-cap quality compounder stock; UMC is a mid-cap income-oriented stock; IMOS is a small-cap quality compounder stock. UMC, IMOS pay a dividend while GFS does not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.