Stock fact sheet · data as of
Transportadora de Gas del Sur S.A. (TGS): fair value, margin of safety and Wheel Score
Ticker symbol TGS · Energy · Oil & Gas Integrated · Argentina · ADR · Blend
TGS is an American depositary share (ADR): the US listing of Transportadora de Gas del Sur S.A., whose own shares trade on its home exchange. It trades in dollars during US hours; currency moves and the home country's rules also affect it, and the depositary bank charges a small yearly fee.
Is TGS undervalued?
At 23.25 (close of 5 Nov 2026), TGS trades 63% below the GLS average fair value of 63.00. That average comes from 9 models run on the latest filings, and 7 of them land above the current price. Margins of safety over 30% are the exception rather than the rule across the ~7,400 stocks we value each night, so the number earns Transportadora de Gas del Sur S.A. the full Value points in the Wheel Score - and a closer look at what the market is pricing in.
The 9 models disagree widely: DDM gives 0.0117 while DCF gives 188.90. A spread that wide means the average is sensitive to which methods you trust; the model table below shows where each one lands, and the Quote page lets you switch any of them off.
Ranked against every other company we cover, neither cheapness nor growth clearly wins for TGS, so the nightly engine files it under Blend (value score 71, growth score 89, out of 100).
Nine valuation models for TGS
Each model turns the latest filed numbers into a value per share; the GLS fair value is the simple average of the ones that produce a positive number. The last two rows are shown for reference and never enter the average. The Quote page lets you switch any model off and add your own margin of safety.
| Model | Value | vs price | What it measures |
|---|---|---|---|
| DCF | 188.90 | +712% | Present value of the projected free cash flows, discounted at the cost of capital |
| Graham Number | 25.62 | +10% | The most a defensive investor pays for the earnings and book value per share |
| Graham Growth | 43.90 | +89% | Graham's growth formula: EPS × (8.5 + 2 × growth), adjusted for bond yields |
| Lynch | 13.20 | -43% | EPS × the earnings growth rate (PEG of 1), growth capped at 25% |
| GLS Growth | 133.19 | +473% | EPS compounded ten years at the blended growth rate, discounted back at 15% a year |
| 10 Cap | 71.45 | +207% | Owner's earnings (operating cash flow less maintenance capex) capitalised at 10% |
| Payback Time | 66.55 | +186% | Eight years of compounded free cash flow: the price at which the business pays for itself |
| DDM | 0.0117 | -100% | Dividend discount model: next year's dividend ÷ (10% − 3% growth); needs a dividend |
| EPV | 24.17 | +4% | Earnings power value: current EPS capitalised at 9% with no growth |
| Zombie (liquidation) | -0.2118 | -101% | Current assets less all liabilities, per share: the balance-sheet floor. Not in the average |
| Wall St target | 0.0000 | -100% | Analysts' average 12-month price target. Not in the average |
Quality and financial health
Financial health is average - TGS passes 5 of the nine Piotroski tests, which falls one point short of the "Piotroski 6 or more" Wheel Trade Filter. The Financials tab on the Quote page shows which tests fail. The GLS Moat score is 6.9 out of 10: a record that is solid on some of the four parts the score weighs (returns on capital, pricing power, lasting growth, balance sheet) and weaker on others.
Returns on capital are moderate - ROIC 10.2%, ROE 15.7%, ROA 9.1% - with debt at 0.53 times equity and a free-cash-flow yield of 6.7%.
The dividend yield is 0.00% with a payout ratio of 5% - a small yield that leaves most of the earnings in the business.
Institutional ownership scores 1/10, insider activity 10/10 and Congressional trading 5/10 on the GLS smart-money scales.
| Piotroski F-score | 5 / 9 | ROIC | 10.2% |
|---|---|---|---|
| GLS Moat | 6.9 / 10 | ROE | 15.7% |
| Debt / equity | 0.53 | ROA | 9.1% |
| Free-cash-flow yield | 6.7% | Payout ratio | 5% |
| Institutions | 1 / 10 | Insiders · Congress | 10 · 5 / 10 |
Wheel Score 53: Fair
TGS scores 53 out of 100 on the Wheel Score (Fair band, 50-69) because it fails filter 4, financially healthy - Piotroski 5/9 (under 6); and filter 5, can repay its debt - debt with no positive cash flow to repay it. A stock must pass all 9 Wheel Trade Filters to reach 70. Otherwise the parts read: value strong, premium strong, moat good, health fair, red flags strong, option trading fair, stability fair.
Implied volatility is 46% on the near-the-money contracts 20-60 days out - inside the 35-60% sweet spot the Wheel Score rewards most: enough premium to be worth selling, not so much that the risk is unpaid. Chain open interest is 5,380 contracts across all expiries - enough for the wheel at normal size.
Volume runs at 417k shares a day on a market cap of $3.5B, with a beta of -0.51 - a low beta, so day-to-day moves are smaller than the market's; the Stability part of the Wheel Score rates that fair.
| Filter | Wheel Trade Filter | Result | Detail |
|---|---|---|---|
| 1 | Options that actually trade | Passes | Listed options with 1,000+ contracts of open interest and 100+ traded a day |
| 2 | A real business, not a gamble | Passes | Profitable over the last twelve months - not a speculative stock, fund or note |
| 3 | Below fair value | Passes | Trading below the nine-model average fair value (margin of safety above 0) |
| 4 | Financially healthy | Fails | Piotroski 5/9 (under 6) |
| 5 | Can repay its debt | Fails | debt with no positive cash flow to repay it |
| 6 | No serious red flags | Passes | Red Flags score 60 or more out of 100 (earnings, margins, debt, analysts, filings and price checked the same way for every stock) |
| 7 | A premium worth selling | Passes | Implied volatility 25-80% (enough premium, not a lottery ticket) |
| 8 | Big enough | Passes | Market cap $1 billion or more |
| 9 | Not a penny stock | Passes | Share price $5 or more |
| How it ranks | Rating | From | |
|---|---|---|---|
| Value | Strong | 63% below fair value | |
| Premium | Strong | implied volatility 46% | |
| Moat | Good | moat 6.9/10 | |
| Health | Fair | Piotroski 5/9 | |
| Red Flags | Strong | Red Flags score 90/100 | |
| Option trading | Fair | 2,699 contracts a day, 5,380 open interest | |
| Stability | Fair | beta -0.51, $3.5B company |
The Wheel Score ranks ~7,400 US stocks for selling cash-secured puts and covered calls: a stock must pass all 9 Wheel Trade Filters to score 70, and the score then ranks the ones that pass; the Sunday Scan is the top 10. It is updated nightly and is not a recommendation. How the Wheel Score works · the walkthrough lesson shows how it fits into a trade, start to finish.
Upcoming events
No upcoming earnings date is recorded for TGS in the nightly calendar.
Earnings, dividend, IPO, split and economic calendars for the whole market, filterable to your watchlists.
Similar stocks in Oil & Gas Integrated
The 12 companies below are the closest to Transportadora de Gas del Sur S.A. by market cap within the Oil & Gas Integrated industry, each with its own fact sheet; the Compare page puts up to eight of them side by side.
| Stock | Close | Fair value | MoS | Wheel | Mkt cap |
|---|---|---|---|---|---|
| NFG National Fuel Gas Company | 76.54 | 69.87 | -10% | 35Weak | $7.3B |
| YPF YPF Sociedad Anónima | 41.61 | 330,391.76 | +100% | 86Prime | $16.3B |
| EC Ecopetrol S.A. | 15.92 | 36.03 | +56% | 54Fair | $32.7B |
| CVE Cenovus Energy Inc. | 28.39 | 32.28 | +12% | 78Good | $52.4B |
| IMO Imperial Oil Limited | 127.47 | 114.14 | -12% | 41Weak | $61.6B |
| E Eni S.p.A. | 56.54 | 70.14 | +19% | 78Good | $84.1B |
| SU Suncor Energy Inc. | 72.04 | 92.61 | +22% | 89Prime | $85.1B |
| EQNR Equinor ASA | 42.80 | 95.79 | +55% | 92Prime | $103.1B |
| BP BP p.l.c. | 45.61 | 92.68 | +51% | 93Prime | $119.6B |
| PBR Petróleo Brasileiro S.A. - Petrobras | 19.61 | 118.96 | +84% | 93Prime | $126.4B |
| SLNG Stabilis Solutions, Inc. | 3.83 | 23.55 | +84% | 28No options | $71M |
| TTE TotalEnergies SE | 90.46 | 142.61 | +37% | 82Good | $201.9B |
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A free GLS Equity account gets you nightly fair value and the Wheel Score on ~7,400 US stocks, a watchlist, the scanner preview and the Sunday Scan - the top 10 stocks that pass all 9 Wheel Trade Filters, emailed every week. Pro adds the full put and call scanners, unlimited watchlists with alerts and the trade journal.
Start free See the Sunday ScanQuestions about TGS
Is TGS undervalued right now?
By the GLS models, yes: at 23.25 the stock is 63% below the average fair value of 63.00 (data as of 5 Nov 2026). Whether the discount is deserved is the question to research next.
What is the Wheel Score of TGS and what does it mean?
TGS scores 53 out of 100 (Fair) - it fails Wheel Trade Filters 4, 5. The Wheel Score ranks stocks for the wheel strategy - selling cash-secured puts, then covered calls if assigned - in two parts: the 9 pass/fail Wheel Trade Filters (busy options, a real business, below fair value, Piotroski 6 or more, debt it can repay, a Red Flags score of 60 or more, implied volatility of 25-80%, a $1 billion company, $5 a share) and a ranking of how strongly a stock passes on value, premium, moat, health, red flags, option trading and stability. A stock that fails any filter stays under 70; 70-84 is Good, 85 and above is Prime. The Sunday Scan is the top 10 that pass, sorted by Wheel Score.
What is the GLS fair value for TGS?
63.00 per share as of 5 Nov 2026 - the simple average of the 9 valuation models (out of nine: DCF, Graham Number, Graham Growth, Lynch, GLS Growth, 10 Cap, Payback Time, DDM and EPV) that produced a positive value. The models run every night on the latest filings; the Quote page lets you switch any of them off and add a margin of safety of your own.
When does Transportadora de Gas del Sur S.A. report earnings next?
No upcoming earnings date is recorded for TGS in our calendar as of 5 Nov 2026; the Calendars page is refreshed every morning.
Does TGS have listed options, and how liquid are they?
Yes. The nightly snapshot found 36 listed contracts with 5,380 open interest across all expiries and implied volatility of 46% on the near-the-money contracts. The Options scanner lists the cash-secured put and covered call set-ups with premium and annualised yield worked out.
Is TGS an ADR?
Yes. TGS is an American depositary share (ADR): the US listing of Transportadora de Gas del Sur S.A., whose own shares trade on its home exchange. It trades in dollars during US hours; currency moves and the home country's rules also affect it, and the depositary bank charges a small yearly fee.