PAM vs LOMA vs YPF vs TGS vs PBR

For growth investors, Transportadora de Gas del Sur S.

A. (TGS) is the stronger pick with 64. 8% revenue growth year-over-year, versus -13. 4% for Petróleo Brasileiro S. A. - Petrobras (PBR). Pampa Energía S. A. (PAM) offers the better valuation at 7. 3x trailing P/E (8. 7x forward), making it the more compelling value choice. Analysts rate Pampa Energía S. A. (PAM) a "Buy" — based on 8 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, Pampa Energía S.

A. (PAM) is the cheapest at 7. 3x versus Loma Negra Compañía Industrial Argentina Sociedad Anónima at 66. 3x. On forward P/E, YPF Sociedad Anónima is actually cheaper at 0. 0x — 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: Petróleo Brasileiro S. A. - Petrobras wins at 0. 12x versus Pampa Energía S. A. 's 1. 11x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, YPF Sociedad Anónima (YPF) delivered a total return of +972.

7%, compared to +120. 7% for Loma Negra Compañía Industrial Argentina Sociedad Anónima (LOMA). Over 10 years, the gap is even starker: PBR returned +428. 2% versus LOMA's -38. 0%. 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), Petróleo Brasileiro S.

A. - Petrobras (PBR) is the lower-risk stock at 0. 06β versus Loma Negra Compañía Industrial Argentina Sociedad Anónima's 1. 60β — meaning LOMA is approximately 2723% more volatile than PBR relative to the S&P 500. On balance sheet safety, Loma Negra Compañía Industrial Argentina Sociedad Anónima (LOMA) carries a lower debt/equity ratio of 28% versus 102% for Petróleo Brasileiro S. A. - Petrobras — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Transportadora de Gas del Sur S.

A. (TGS) is pulling ahead at 64. 8% versus -13. 4% for Petróleo Brasileiro S. A. - Petrobras (PBR). On earnings-per-share growth, the picture is similar: Pampa Energía S. A. grew EPS 429. 4% year-over-year, compared to -149. 6% for YPF Sociedad Anónima. Over a 3-year CAGR, YPF leads at 119. 0% 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.

Pampa Energía S.

A. (PAM) is the more profitable company, earning 33. 0% net margin versus -4. 5% for YPF Sociedad Anónima — meaning it keeps 33. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TGS leads at 43. 3% versus 8. 9% for YPF. At the gross margin level — before operating expenses — TGS leads at 53. 6%, 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, Petróleo Brasileiro S. A. - Petrobras (PBR) is the more undervalued stock at a PEG of 0. 12x versus Pampa Energía S. A. 's 1. 11x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, YPF Sociedad Anónima (YPF) trades at 0. 0x forward P/E versus 8. 7x for Pampa Energía S. A. — 8. 7x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PAM: 17. 6% to $97. 00.

In this comparison, PBR (27.

9% yield), TGS (4. 2% yield) pay a dividend. PAM, LOMA, YPF do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Petróleo Brasileiro S.

A. - Petrobras (PBR) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 06), 27. 9% yield, +428. 2% 10Y return). Loma Negra Compañía Industrial Argentina Sociedad Anónima (LOMA) carries a higher beta of 1. 60 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (PBR: +428. 2%, LOMA: -38. 0%), 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.

These companies operate in different sectors (PAM (Utilities) and LOMA (Basic Materials) and YPF (Energy) and TGS (Energy) and PBR (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: PAM is a small-cap deep-value stock; LOMA is a small-cap high-growth stock; YPF is a mid-cap high-growth stock; TGS is a small-cap high-growth stock; PBR is a mid-cap deep-value stock. TGS, PBR pay a dividend while PAM, LOMA, YPF do 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.