Diamondback Energy, Inc. (FANG) vs Eli Lilly and Company (LLY): Which Is the Better Buy in 2026?
As of 2026-06-19, FANG is overvalued at $184, with a DCF intrinsic value of $128 and a margin of safety of -44%. LLY is fairly valued at $1099, with an intrinsic value of $1143 and a margin of safety of 4%. Of the two, LLY has the wider margin of safety.
Rewards
- ★Gross margin of 72.2% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Eli Lilly and Company has maintained ROIC above 15% for 4 consecutive years, indicating a durable competitive advantage.
- ★Gross margin of 82.8% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Eli Lilly and Company scores 73/100 on the Economic Moat Score (Wide Moat), with roic consistency as the strongest competitive dimension.
Risks
- ⚠ROIC has declined by 16.4 percentage points over the past 4 years, which may signal competitive erosion.
- ⚠Diamondback Energy, Inc. scores only 14/100 on the Economic Moat Score, suggesting limited durable competitive advantages.
- ⚠Share count has increased by 58% over the past 4 years, diluting existing shareholders.
- ⚠FCF yield of 0.9% is below 3%, meaning the market is pricing in substantial future growth to justify the current price.
- ⚠Insiders have sold $18.6M worth of stock in the past 3 months — significant insider liquidation.
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 $184?
The market implies +16.9% Owner Earnings growth, above historical trends.
Standard FCF implies a demanding +19.3%, reflecting heavy growth investment.
What growth rate is the market pricing in at $1099?
The market implies +20.0% Owner Earnings growth, below historical trends — potential opportunity.
Standard FCF implies a more demanding +31.4%, reflecting heavy growth investment expected to generate future returns.
Economic Moat Score
Learn more →No durable competitive advantage detected. The business shows limited evidence of pricing power, consistent returns, or capital efficiency.
Wide moat driven primarily by roic consistency. Reinvestment Efficiency is the area most vulnerable to competitive pressure.
Forensic Accounting
Learn more →M-Score Trend
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 pricing this stock without strong emotion in either direction"
"Market is optimistic — be cautious and ensure you have a margin of safety"
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: FANG vs LLY
Is Diamondback Energy, Inc. or Eli Lilly and Company more undervalued in 2026?▼
Based on our discounted cash flow model, LLY trades at a 3.9% margin of safety (intrinsic value $1143 vs. price $1099), compared to FANG's -43.9% margin of safety (intrinsic $128 vs. $184).
Which stock has a wider economic moat, Diamondback Energy, Inc. or Eli Lilly and Company?▼
LLY scores 73/100 (Wide moat), while FANG scores 14/100 (None moat). The moat score measures competitive advantage durability across ROIC consistency, margin stability, revenue predictability, and reinvestment efficiency.
Is Diamondback Energy, Inc. in financial distress?▼
FANG's Altman Z-Score of 1.4 places it in the Distress zone, signaling elevated bankruptcy risk. LLY scores 8.7 (Safe 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, Diamondback Energy, Inc. or Eli Lilly and Company?▼
Diamondback Energy, Inc. (FANG) generates a 2.7% free cash flow yield, compared to Eli Lilly and Company's 0.9%. 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, Diamondback Energy, Inc. or Eli Lilly and Company?▼
LLY earns 37.8% ROIC versus FANG's 1.2%. 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, Diamondback Energy, Inc.'s or Eli Lilly and Company's?▼
LLY's dividend earns a safety score of 64/100 (Safe), compared to FANG's 60/100 (Safe). LLY has raised its dividend for 3 consecutive years.