SLM vs SYF vs COF vs ALLY

For growth investors, Capital One Financial Corporation (COF) is the stronger pick with 28.

4% revenue growth year-over-year, versus -25. 7% for Ally Financial Inc. (ALLY). SLM Corporation (SLM) offers the better valuation at 6. 5x trailing P/E (7. 3x forward), making it the more compelling value choice. Analysts rate SLM Corporation (SLM) a "Buy" — based on 25 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, SLM Corporation (SLM) is the cheapest at 6.

5x versus Capital One Financial Corporation at 47. 8x. On forward P/E, SLM Corporation is actually cheaper at 7. 3x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Synchrony Financial wins at 0. 25x versus SLM Corporation's 0. 81x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Synchrony Financial (SYF) delivered a total return of +72.

2%, compared to -8. 1% for Ally Financial Inc. (ALLY). Over 10 years, the gap is even starker: SLM returned +284. 8% versus SYF's +176. 3%. 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), SLM Corporation (SLM) is the lower-risk stock at 1.

13β versus Capital One Financial Corporation's 1. 58β — meaning COF is approximately 40% more volatile than SLM relative to the S&P 500. On balance sheet safety, Capital One Financial Corporation (COF) carries a lower debt/equity ratio of 45% versus 2% for SLM Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Capital One Financial Corporation (COF) is pulling ahead at 28.

4% versus -25. 7% for Ally Financial Inc. (ALLY). On earnings-per-share growth, the picture is similar: Ally Financial Inc. grew EPS 31. 7% year-over-year, compared to -65. 2% for Capital One Financial Corporation. 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.

SLM Corporation (SLM) is the more profitable company, earning 24.

0% net margin versus 3. 5% for Capital One Financial Corporation — meaning it keeps 24. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: SLM leads at 31. 9% versus 3. 3% for COF. At the gross margin level — before operating expenses — SLM leads at 53. 1%, 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, Synchrony Financial (SYF) is the more undervalued stock at a PEG of 0. 25x versus SLM Corporation's 0. 81x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, SLM Corporation (SLM) trades at 7. 3x forward P/E versus 9. 8x for Capital One Financial Corporation — 2. 5x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for COF: 38. 8% to $267. 18.

In this comparison, SLM (14.

9% yield), COF (1. 7% yield), SYF (1. 6% yield) pay a dividend. ALLY does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, SLM Corporation (SLM) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1.

13), 14. 9% yield, +284. 8% 10Y return). Both have compounded well over 10 years (SLM: +284. 8%, ALLY: +209. 6%), 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 Financial Services sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: SLM is a small-cap deep-value stock; SYF is a mid-cap deep-value stock; COF is a mid-cap high-growth stock; ALLY is a mid-cap quality compounder stock. SLM, SYF, COF pay a dividend while ALLY 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.