Interactive Brokers Group, Inc. (IBKR) vs Pfizer Inc. (PFE): Which Is the Better Buy in 2026?
As of 2026-06-21, IBKR is overvalued at $96, with a DCF intrinsic value of $73 and a margin of safety of -31%. PFE is overvalued at $25, with an intrinsic value of $22 and a margin of safety of -12%. Of the two, PFE has the wider margin of safety.
Rewards
- ★Interactive Brokers Group, Inc. has maintained ROIC above 15% for 4 consecutive years, indicating a durable competitive advantage.
- ★Gross margin of 93.0% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Interactive Brokers Group, Inc. scores 81/100 on the Economic Moat Score (Wide Moat), with roic consistency as the strongest competitive dimension.
- ★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
- ⚠Despite buyback spending, shares outstanding increased in 3 out of 4 years — stock-based compensation is offsetting repurchases.
- ⚠Trailing P/E of 41.2x is 88% above the historical average of 21.9x — the stock trades at a premium to its own history.
- ⚠PEG ratio of 2.59 indicates the stock is expensive relative to its expected growth — the market may be pricing in more growth than analysts project.
- ⚠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 →Requires positive FCF to compute implied growth rate.
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 →Wide moat driven primarily by roic consistency. Revenue Predictability is the area most vulnerable to competitive pressure.
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
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 optimistic — be cautious and ensure you have a margin of safety"
"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: IBKR vs PFE
Is Interactive Brokers Group, Inc. or Pfizer Inc. more undervalued in 2026?▼
Based on our discounted cash flow model, PFE trades at a -12.3% margin of safety (intrinsic value $22 vs. price $25), compared to IBKR's -30.9% margin of safety (intrinsic $73 vs. $96).
Which stock has a wider economic moat, Interactive Brokers Group, Inc. or Pfizer Inc.?▼
IBKR scores 81/100 (Wide 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 Interactive Brokers Group, Inc. in financial distress?▼
IBKR's Altman Z-Score of 0.4 places it in the Distress zone, signaling elevated bankruptcy risk. PFE scores 2.1 (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 stock has higher return on invested capital, Interactive Brokers Group, Inc. or Pfizer Inc.?▼
PFE earns 10.2% ROIC versus IBKR's 7.3%. 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, Interactive Brokers Group, Inc.'s or Pfizer Inc.'s?▼
IBKR's dividend earns a safety score of 94/100 (Very Safe), compared to PFE's 24/100 (Unsafe). IBKR has raised its dividend for 3 consecutive years.