NRG Energy, Inc. (NRG) vs Pfizer Inc. (PFE): Which Is the Better Buy in 2026?
As of 2026-06-19, NRG is fairly valued at $135, with a DCF intrinsic value of $136 and a margin of safety of 1%. PFE is overvalued at $25, with an intrinsic value of $22 and a margin of safety of -12%. Of the two, NRG has the wider margin of safety.
Rewards
- ★Share count has been reduced by 17% over the past 4 years through buybacks, increasing each share's claim on earnings.
- ★PEG ratio of 0.45 suggests the stock is undervalued relative to its growth rate — paying less than 1x for each unit of earnings growth.
- ★Gross margin of 74.8% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★FCF yield of 8.6% is historically attractive — the business generates significant cash relative to its price.
- ★Trailing P/E of 19.2x is 37% below the historical average of 30.4x — potentially undervalued relative to its own history.
Risks
- ⚠ROIC has declined by 5.4 percentage points over the past 4 years, which may signal competitive erosion.
- ⚠Gross margin of 16.4% is low, suggesting a competitive or commodity-like market with limited pricing power.
- ⚠FCF yield of 2.7% is below 3%, meaning the market is pricing in substantial future growth to justify the current price.
- ⚠ROIC has declined by 15.9 percentage points over the past 4 years, which may signal competitive erosion.
- ⚠PEG ratio of 13.77 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
- ⚠Free cash flow has declined at a 29.6% CAGR over the past 4 years — a concerning trend.
Key Valuation Metrics
Learn more →Historical Fundamentals
Learn more →Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation. The dashed forward point is the forward P/E — today's price ÷ analyst consensus EPS.
$1 Retained Earnings Test
Learn more →> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
Buffett's "$1 Test": For every $1 of earnings retained, has management created at least $1 of market value?
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
Discounted Cash Flow (DCF) Analysis
Learn more →Reverse DCF — Market-Implied Growth
Learn more →What growth rate is the market pricing in at $135?
The market implies +22.7% Owner Earnings growth, above historical trends.
Standard FCF implies a demanding +24.4%, reflecting heavy growth investment.
What growth rate is the market pricing in at $25?
The market implies +5.2% Owner Earnings growth, above historical trends.
Standard FCF implies a demanding +4.5%, reflecting heavy growth investment.
Economic Moat Score
Learn more →Narrow moat with reinvestment efficiency as the key competitive advantage. Improving margin stability would strengthen the moat.
No durable moat detected, though reinvestment efficiency shows some competitive positioning. The business lacks consistent evidence of sustainable advantages.
Forensic Accounting
Learn more →M-Score Trend
Beneish's 8-variable model estimates the probability of earnings manipulation. An M-Score above -1.78 signals elevated risk — companies in this range have historically been 3-5× more likely to be manipulating earnings. Scores between -2.22 and -1.78 fall in a grey zone warranting further investigation.
Ownership Breakdown
Learn more →High insider ownership aligns management incentives with shareholders. Institutional concentration can indicate smart-money conviction but also crowding risk.
Insider Buying Activity
Learn more →Open market purchases · includes direct & indirect ownership · excludes option exercises.
Insider Selling Activity
Learn more →Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives.
🎭 Mr. Market's Mood
Learn more →"Market is pessimistic — investigate whether fears are temporary or structural"
"Market is pricing this stock without strong emotion in either direction"
Composite sentiment score based on market signals. Inspired by Buffett’s "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.
⚖️ Buffett Signal
Learn more →The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
Frequently Asked Questions: NRG vs PFE
Is NRG Energy, Inc. or Pfizer Inc. more undervalued in 2026?▼
Based on our discounted cash flow model, NRG trades at a 0.7% margin of safety (intrinsic value $136 vs. price $135), compared to PFE's -12.3% margin of safety (intrinsic $22 vs. $25).
Which stock has a wider economic moat, NRG Energy, Inc. or Pfizer Inc.?▼
NRG scores 42/100 (Narrow moat), while PFE scores 35/100 (None moat). The moat score measures competitive advantage durability across ROIC consistency, margin stability, revenue predictability, and reinvestment efficiency.
Is Pfizer Inc. in financial distress?▼
PFE's Altman Z-Score of 2.1 places it in the Grey zone, signaling elevated bankruptcy risk. NRG scores 2.2 (Grey zone). The Altman Z-Score is a five-factor model that predicts insolvency within two years; scores below 1.81 indicate significant distress.
Which company has better free cash flow, NRG Energy, Inc. or Pfizer Inc.?▼
Pfizer Inc. (PFE) generates a 8.6% free cash flow yield, compared to NRG Energy, Inc.'s 2.7%. A higher FCF yield means the business converts more of its market value into cash that can be returned to shareholders or reinvested.
Which stock has higher return on invested capital, NRG Energy, Inc. or Pfizer Inc.?▼
PFE earns 10.2% ROIC versus NRG's 3.3%. A higher ROIC means the company generates more profit per dollar of capital employed, a hallmark of durable competitive advantage in Buffett-style analysis.
Which dividend is safer, NRG Energy, Inc.'s or Pfizer Inc.'s?▼
NRG's dividend earns a safety score of 94/100 (Very Safe), compared to PFE's 24/100 (Unsafe). NRG has raised its dividend for 3 consecutive years.