Compare Stocks › MPWR vs PFE
Monolithic Power Systems, Inc. (MPWR) vs Pfizer Inc. (PFE)
MPWR
Monolithic Power Systems, Inc.
$1583.48
VS
PFE
Pfizer Inc.
$26.33
Rewards
MPWR
- ★Monolithic Power Systems, Inc. scores 76/100 on the Economic Moat Score (Wide Moat), with reinvestment efficiency as the strongest competitive dimension.
- ★Free cash flow has grown at a 52.3% CAGR over the past 4 years, demonstrating strong earnings power growth.
- ★Each dollar of retained earnings has created $1.06 of earning power — management is creating shareholder value.
PFE
- ★Gross margin of 75.8% indicates strong pricing power — typical of businesses with significant intellectual property or brand strength.
- ★Dividend yield of 6.53% with a consistent or growing payout over the past 4 years.
- ★FCF yield of 9.0% is historically attractive — the business generates significant cash relative to its price.
Risks
MPWR
- ⚠Buybacks have been poorly timed — 2 out of 3 years involved repurchases at relatively expensive valuations.
- ⚠Despite buyback spending, shares outstanding increased in 2 out of 3 years — stock-based compensation is offsetting repurchases.
- ⚠Trailing P/E of 113.7x is 133% above the historical average of 48.7x — the stock trades at a premium to its own history.
PFE
- ⚠ROIC has declined by 13.9 percentage points over the observed period, 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 →MPWR
PFE
Valuation
N/A
Free Cash Flow
$13.43B
N/A
FCF Yield
8.97%
113.67
Trailing P/E
19.36
52.50
Forward P/E
9.36
Quality & Moat
N/A
ROIC
7.67%
N/A
ROE
8.96%
55.17%
Gross Margin
75.81%
2.81
PEG Ratio
13.77
Balance Sheet Safety
N/A
Debt / Equity
0.78
No debt
Interest Coverage
N/A
-1.60
Net Debt / EBITDA
2.10
0.51%
Dividend Yield
6.53%
MPWR: 2PFE: 4
MPWRPFE
Historical Fundamentals
Learn more →MPWR
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.
PFE
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.
Price ÷ Earnings Per Share — how many years of current earnings you're paying for at today's price. Lower P/E may indicate undervaluation.
$1 Retained Earnings Test
Learn more →MPWR
$14.25
created per $1 retained over 3 years
Exceptional Value Creator
Σ Retained
$1.93B
Δ Market Cap
+$27.49B
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
> $1 created per $1 retained = Value Creator · < $1 created = Value Destroyer
PFE
N/A
Net losses over 3 years — test not applicable
Company had negative cumulative retained earnings
Σ Retained
$-10.61B
Δ Market Cap
$-146.18B
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
> $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 →MPWR
102.8% Overvalued
Price is 102.8% above estimated fair value
Current Price: $1583.48
Strongly undervalued
Fairly valued
Strongly overvalued
Fair Value: $780.78
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
PFE
130.7% Overvalued
Price is 130.7% above estimated fair value
Current Price: $26.33
Strongly undervalued
Strongly overvalued
Fair Value: $11.41
Strongly undervalued
Undervalued
Fairly valued
Overvalued
Strongly overvalued
Reverse DCF — Market-Implied Growth
Learn more →MPWR
Requires positive FCF to compute implied growth rate.
PFE
What growth rate is the market pricing in at $26?
+11.4%
Market-Implied Owner Earnings Growth
Standard FCF implies +4.0%
The market implies +11.4% Owner Earnings growth, above historical trends.
Standard FCF implies a demanding +4.0%, reflecting heavy growth investment.
Economic Moat Score
Learn more →MPWR
76/100
Wide Moat
70+ Wide · 40-69 Narrow · <40 None
Wide moat driven primarily by reinvestment efficiency. Revenue Predictability is the area most vulnerable to competitive pressure.
Composite score measuring competitive advantage durability across four dimensions: returns above cost of capital, pricing power stability, revenue predictability, and capital efficiency. Based on 4 years of fundamental data.
PFE
35/100
No Moat
70+ Wide · 40-69 Narrow · <40 None
No durable moat detected, though reinvestment efficiency shows some competitive positioning. The business lacks consistent evidence of sustainable advantages.
Composite score measuring competitive advantage durability across four dimensions: returns above cost of capital, pricing power stability, revenue predictability, and capital efficiency. Based on 5 years of fundamental data.
Forensic Accounting
Learn more →MPWR
-2.51
Unlikely Manipulator
Above -1.78 = likely manipulator · -2.22 to -1.78 = grey zone
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.
PFE
-2.53
Unlikely Manipulator
Above -1.78 = likely manipulator · -2.22 to -1.78 = grey zone
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.
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 →MPWR
Insiders 3.8%Institutions 101.5%
No. of Institutional Holders1,560
High insider ownership aligns management incentives with shareholders — a key signal in Buffett-style analysis. Institutional concentration can indicate smart-money conviction but also crowding risk.
PFE
Insiders 0.1%Institutions 67.9%Retail & Other 32.0%
No. of Institutional Holders3,687
High insider ownership aligns management incentives with shareholders — a key signal in Buffett-style analysis. Institutional concentration can indicate smart-money conviction but also crowding risk.
High insider ownership aligns management incentives with shareholders. Institutional concentration can indicate smart-money conviction but also crowding risk.
Insider Buying Activity
Learn more →MPWR
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
Open market purchases · includes direct & indirect ownership · excludes option exercises
PFE
0
Buys (3M)
0
Buys (12M)
No open market insider purchases found.
Open market purchases · includes direct & indirect ownership · excludes option exercises
Open market purchases · includes direct & indirect ownership · excludes option exercises.
Insider Selling Activity
Learn more →MPWR
13
Sells (3M)
45
Sells (12M)
Total value (12M): $591.44M
TSENG SARIA H
General Counsel
$11.70M
@ $1305.22 · 2026-04-08
TSENG SARIA H
General Counsel
$8.92M
@ $1167.95 · 2026-04-06
TSENG SARIA H
General Counsel
$1.59M
@ $1133.52 · 2026-04-01
TSENG SARIA H
General Counsel
$25.94M
@ $1010.50 · 2026-03-30
HSING MICHAEL R
Chief Executive Officer
$38.67M
@ $1171.83 · 2026-02-12
HSING MICHAEL R
Chief Executive Officer
$39.23M
@ $1188.92 · 2026-02-11
HSING MICHAEL R
Chief Executive Officer
$38.84M
@ $1142.28 · 2026-02-10
LEE VICTOR K
Director
$484,864
@ $1212.16 · 2026-02-09
HSING MICHAEL R
Chief Executive Officer
$64.32M
@ $1171.16 · 2026-02-06
XIAO DEMING
Officer
$26.79M
@ $1171.16 · 2026-02-06
SCIAMMAS MAURICE
Officer
$26.79M
@ $1171.16 · 2026-02-06
BLEGEN THEODORE
Chief Financial Officer
$25.44M
@ $1171.16 · 2026-02-06
TSENG SARIA H
General Counsel
$26.79M
@ $1171.16 · 2026-02-06
BLEGEN THEODORE
Chief Financial Officer
$3.39M
@ $1129.76 · 2026-02-02
LEE VICTOR K
Director
$558,516
@ $930.86 · 2026-01-02
BLEGEN THEODORE
Chief Financial Officer
$2.82M
@ $940.47 · 2026-01-02
LEE VICTOR K
Director
$951,719
@ $951.72 · 2025-12-24
BLEGEN THEODORE
Chief Financial Officer
$2.72M
@ $908.21 · 2025-12-01
TSENG SARIA H
General Counsel
$18.53M
@ $926.47 · 2025-11-26
CHANG KUO WEI HERBERT
Director
$89,697
@ $896.97 · 2025-11-25
TSENG SARIA H
General Counsel
$18.08M
@ $904.18 · 2025-11-25
SCIAMMAS MAURICE
Officer
$3.56M
@ $895.23 · 2025-11-24
CHANG KUO WEI HERBERT
Director
$87,397
@ $873.97 · 2025-11-21
SCIAMMAS MAURICE
Officer
$6.12M
@ $870.21 · 2025-11-19
SCIAMMAS MAURICE
Officer
$24.66M
@ $881.66 · 2025-11-19
HSING MICHAEL R
Chief Executive Officer
$35.72M
@ $965.52 · 2025-11-12
HSING MICHAEL R
Chief Executive Officer
$38.34M
@ $958.39 · 2025-11-11
BLEGEN THEODORE
Chief Financial Officer
$3.07M
@ $1024.43 · 2025-11-03
TSENG SARIA H
General Counsel
$1.41M
@ $1087.62 · 2025-10-24
TSENG SARIA H
General Counsel
$17.14M
@ $1017.77 · 2025-10-16
BLEGEN THEODORE
Chief Financial Officer
$2.74M
@ $913.22 · 2025-10-01
MARTINEZ CARINTIA
Director
$1.26M
@ $900.00 · 2025-09-18
TSENG SARIA H
General Counsel
$13.27M
@ $914.45 · 2025-09-18
BLEGEN THEODORE
Chief Financial Officer
$2.44M
@ $814.34 · 2025-09-02
ELMIGER EUGEN J
Director
$3.39M
@ $846.71 · 2025-08-29
ZHOU JEFFREY
Director
$167,910
@ $870.00 · 2025-08-27
HSING MICHAEL R
Chief Executive Officer
$16.77M
@ $829.10 · 2025-08-15
ZHOU JEFFREY
Director
$340,000
@ $850.00 · 2025-08-13
ZHOU JEFFREY
Director
$166,000
@ $830.00 · 2025-08-12
XIAO DEMING
Officer
$31.20M
@ $780.00 · 2025-08-01
BLEGEN THEODORE
Chief Financial Officer
$2.25M
@ $750.00 · 2025-08-01
BLEGEN THEODORE
Chief Financial Officer
$4.50M
@ $750.00 · 2025-07-01
CHANG KUO WEI HERBERT
Director
$36,900
@ $738.00 · 2025-05-13
CHANG KUO WEI HERBERT
Director
$69,800
@ $698.00 · 2025-05-12
CHANG KUO WEI HERBERT
Director
$65,000
@ $650.00 · 2025-05-08
HSING MICHAEL R
Chief Executive Officer
$3.64M
@ $700.00 · 2025-02-18
HSING MICHAEL R
Chief Executive Officer
$1.86M
@ $717.10 · 2025-02-10
XIAO DEMING
Officer
$474,721
@ $717.10 · 2025-02-10
SCIAMMAS MAURICE
Officer
$474,721
@ $717.10 · 2025-02-10
BLEGEN THEODORE
Chief Financial Officer
$381,498
@ $717.10 · 2025-02-10
TSENG SARIA H
General Counsel
$475,438
@ $717.10 · 2025-02-10
HSING MICHAEL R
Chief Executive Officer
$8.37M
@ $700.00 · 2025-02-07
HSING MICHAEL R
Chief Executive Officer
$2.55M
@ $700.00 · 2025-01-24
BLEGEN THEODORE
Chief Financial Officer
$1.50M
@ $600.00 · 2024-12-09
HSING MICHAEL R
Chief Executive Officer
$2.15M
@ $765.15 · 2024-11-08
XIAO DEMING
Officer
$662,611
@ $765.14 · 2024-11-08
SCIAMMAS MAURICE
Officer
$662,611
@ $765.14 · 2024-11-08
BLEGEN THEODORE
Chief Financial Officer
$561,620
@ $765.15 · 2024-11-08
TSENG SARIA H
General Counsel
$662,611
@ $765.14 · 2024-11-08
BLEGEN THEODORE
Chief Financial Officer
$1.93M
@ $772.96 · 2024-11-01
SCIAMMAS MAURICE
Officer
$10.23M
@ $929.59 · 2024-10-07
BLEGEN THEODORE
Chief Financial Officer
$2.27M
@ $908.36 · 2024-10-01
BLEGEN THEODORE
Chief Financial Officer
$2.26M
@ $904.20 · 2024-09-03
CHANG KUO WEI HERBERT
Director
$178,688
@ $893.44 · 2024-08-15
HSING MICHAEL R
Chief Executive Officer
$3.53M
@ $827.18 · 2024-08-09
HSING MICHAEL R
Chief Executive Officer
$2.17M
@ $778.39 · 2024-08-08
XIAO DEMING
Officer
$668,637
@ $778.39 · 2024-08-08
SCIAMMAS MAURICE
Officer
$668,637
@ $778.39 · 2024-08-08
BLEGEN THEODORE
Chief Financial Officer
$566,668
@ $778.39 · 2024-08-08
TSENG SARIA H
General Counsel
$668,637
@ $778.39 · 2024-08-08
BLEGEN THEODORE
Chief Financial Officer
$2.13M
@ $852.51 · 2024-08-01
HSING MICHAEL R
Chief Executive Officer
$7.99M
@ $831.58 · 2024-07-22
XIAO DEMING
Officer
$2.67M
@ $831.58 · 2024-07-22
SCIAMMAS MAURICE
Officer
$2.67M
@ $831.58 · 2024-07-22
BLEGEN THEODORE
Chief Financial Officer
$2.15M
@ $831.58 · 2024-07-22
TSENG SARIA H
General Counsel
$2.67M
@ $831.58 · 2024-07-22
SCIAMMAS MAURICE
Officer
$9.28M
@ $843.83 · 2024-07-08
TSENG SARIA H
General Counsel
$1.53M
@ $824.65 · 2024-07-02
HSING MICHAEL R
Chief Executive Officer
$2.15M
@ $804.57 · 2024-07-01
BLEGEN THEODORE
Chief Financial Officer
$2.01M
@ $804.19 · 2024-07-01
TSENG SARIA H
General Counsel
$29.98M
@ $808.20 · 2024-07-01
LEE VICTOR K
Director
$820,460
@ $820.46 · 2024-06-28
BLEGEN THEODORE
Chief Financial Officer
$1.83M
@ $731.77 · 2024-06-05
HSING MICHAEL R
Chief Executive Officer
$5.85M
@ $731.08 · 2024-06-03
XIAO DEMING
Officer
$1.00M
@ $769.40 · 2024-05-22
CHANG KUO WEI HERBERT
Director
$150,000
@ $750.00 · 2024-05-20
ZHOU JEFFREY
Director
$150,000
@ $750.00 · 2024-05-20
CHANG KUO WEI HERBERT
Director
$147,000
@ $735.00 · 2024-05-15
HSING MICHAEL R
Chief Executive Officer
$1.95M
@ $690.00 · 2024-05-08
XIAO DEMING
Officer
$599,627
@ $690.02 · 2024-05-08
SCIAMMAS MAURICE
Officer
$599,610
@ $690.00 · 2024-05-08
BLEGEN THEODORE
Chief Financial Officer
$508,515
@ $689.98 · 2024-05-08
TSENG SARIA H
General Counsel
$599,627
@ $690.02 · 2024-05-08
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
PFE
0
Sells (3M)
0
Sells (12M)
No open market insider sales found.
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives
Direct ownership only · excludes indirect, option exercises, planned (10b5-1) sales & derivatives.
🎭 Mr. Market's Mood
Learn more →MPWR
😏Greed(63/100)
"Market is optimistic — be cautious and ensure you have a margin of safety"
Composite sentiment score based on 6 market signals. Inspired by Buffett's "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.
PFE
😐Neutral(54/100)
"Market is pricing this stock without strong emotion in either direction"
Composite sentiment score based on 6 market signals. Inspired by Buffett's "Mr. Market" allegory — fear = potential opportunity, greed = potential risk. Must be used alongside fundamental analysis, not in isolation.
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 →MPWR
⚪Awaiting DCF Data
The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
DCF Margin of Safety: N/AMr. Market's Mood: Greed (63)
PFE
⚪Awaiting DCF Data
The Buffett Signal cross-references market sentiment with DCF valuation. Configure the DCF Analysis above to generate a signal.
DCF Margin of Safety: N/AMr. Market's Mood: Neutral (54)