❉ Buffybot wonderful businesses, fair prices

← back

MPWR Monolithic Power Systems

semiconductor · valued with codex-sub-gpt5.6 medium conviction · 2026-07-16

HOLD
wonderful · 86 ▟ narrow moat circle of competence: edge ✓ would own for a decade trend up · +14.3% vs 200-DMA
Owner-earnings value$224.71
Price$1,352.66
Margin of safety -83.4%

A superb power-chip compounder priced as though exceptional growth can persist almost indefinitely.

The business

Monolithic Power Systems designs power-management semiconductors that regulate and convert electricity inside data centers, vehicles, industrial equipment, and consumer devices. It earns revenue by selling differentiated chips into applications where efficiency, reliability, size, and system integration matter. The fabless model limits manufacturing investment but leaves production dependent on outside foundries.

Quality gate · 86/100

Returns on capital 24.9/30
Consistency 19.4/22
Margins / pricing power 14.5/16
Balance sheet 16.0/16
Cash conversion 7.2/10
Capital allocation 3.4/6
Median ROIC17.9%
Gross margin55.2%
Net debt / EBITDA-1.3x
FCF conversion67%
Share count / yr+1.1%
Profitable years4/4

Moat & management

Moat ▟ narrow moat
Sourceswitching costs
Trajectorywidening
Managementadequate

Proprietary process expertise, integrated designs, and lengthy customer qualification create meaningful switching costs once its chips are designed into a system. Expanding engineering capabilities and product breadth are strengthening the moat, though formidable analog competitors prevent a wide rating.

Management has reinvested successfully, gained share, and maintained a net-cash balance sheet. Persistent share dilution and modest free-cash-flow conversion temper the capital-allocation assessment.

Owner-earnings inputs

Owner earnings (TTM)626.62M
Owner-earnings yield0.9%
Free-cash-flow yield0.9%
Growth used (normalized)11.0%
Market-implied growth (reverse DCF)25.0%
Terminal growth3.0%
Discount rate (hurdle)12.2%

Projected owner earnings

YrOwner earningsGrowthPV
1651.38M 11.0%580.35M
2719.31M 10.4%570.98M
3790.22M 9.9%558.86M
4863.59M 9.3%544.15M
5938.85M 8.7%527.06M
61.02B 8.1%507.82M
71.09B 7.6%486.69M
81.17B 7.0%463.97M
91.24B 6.4%439.95M
101.32B 5.9%414.93M
111.39B 5.3%389.22M
121.45B 4.7%363.12M
131.51B 4.1%336.93M
141.57B 3.6%310.91M
151.61B 3.0%285.31M

Key risks

  • The valuation assumes roughly 25% annual growth, far beyond a prudent decade-long underwriting rate
  • Technological displacement or stronger competition could reduce design wins and pricing power
  • Semiconductor cyclicality and dependence on Asian manufacturing could permanently impair earnings

Catalysts

  • Rising power-management content in AI data centers
  • Continued share gains in automotive and industrial electrification

Recent news

score · 8 articles

  • Monolithic Power Systems and Amkor Stocks Trade Up, What You Need To Know
  • 2 Profitable Stocks to Research Further and 1 We Question
  • 5 Power Chip Stocks Built for the Electrification Surge
  • 5 Analog Chip Stocks Set to Rebound as the Cycle Changes
  • Monolithic vs. Qualcomm: Which Semiconductor Stock Has More Upside?
  • Can Vicor's Licensing Royalties Strengthen Long-Term Growth?
  • Earnings Preview: What to Expect From Monolithic Power Systems' Report
  • Does Monolithic Power Systems’ (MPWR) Index Shift Clarify Its Long-Term Competitive Positioning?

⚠ maintenance capex ≈ min(capex, D&A), capped at FCF · Net cash 1.1B credited to value (interest stripped from owner earnings to avoid double-counting). · Price pays for ~25%/yr owner-earnings growth over 15y (reverse DCF); model credits 11%. · Rich vs our conservative value, but a quality business is not a short — stance is WAIT for a better price, not sell.

History

DateQualityPriceValueMoSRating
2026-10-28 86 $1,211.89 $194.68 -83.9% HOLD
2026-10-27 86 $1,167.27 $194.68 -83.3% HOLD
2026-10-26 86 $1,140.12 $194.68 -82.9% HOLD
2026-10-23 86 $1,167.93 $194.68 -83.3% HOLD
2026-10-22 86 $1,283.32 $194.68 -84.8% HOLD
2026-10-21 86 $1,248.74 $194.68 -84.4% HOLD
2026-10-20 86 $1,253.66 $194.68 -84.5% HOLD
2026-10-19 86 $1,210.86 $194.68 -83.9% HOLD
2026-10-16 86 $1,249.20 $194.68 -84.4% HOLD
2026-10-15 86 $1,243.11 $194.68 -84.3% HOLD
2026-10-14 86 $1,319.55 $194.68 -85.2% HOLD
2026-10-13 86 $1,319.23 $194.68 -85.2% HOLD
2026-10-12 86 $1,386.29 $194.68 -86.0% HOLD
2026-10-09 86 $1,369.80 $194.68 -85.8% HOLD
2026-10-08 86 $1,425.98 $194.68 -86.3% HOLD
2026-10-07 86 $1,473.69 $206.68 -86.0% HOLD
2026-10-06 86 $1,479.89 $206.68 -86.0% HOLD
2026-10-05 86 $1,439.73 $206.68 -85.6% HOLD
2026-10-02 86 $1,360.97 $206.68 -84.8% HOLD
2026-10-01 86 $1,347.22 $206.68 -84.7% HOLD
2026-09-30 86 $1,355.99 $206.68 -84.8% HOLD
2026-09-29 86 $1,351.20 $206.68 -84.7% HOLD
2026-09-28 86 $1,367.43 $206.68 -84.9% HOLD
2026-09-25 86 $1,335.55 $206.68 -84.5% HOLD
2026-09-24 86 $1,355.47 $206.68 -84.8% HOLD
2026-09-23 86 $1,277.68 $206.68 -83.8% HOLD
2026-09-22 86 $1,277.68 $206.68 -83.8% HOLD
2026-09-21 86 $1,217.80 $206.68 -83.0% HOLD
2026-09-18 86 $1,169.58 $206.68 -82.3% HOLD
2026-09-17 86 $1,147.61 $206.68 -82.0% HOLD
2026-09-16 86 $1,142.46 $206.68 -81.9% HOLD
2026-09-15 86 $1,143.24 $206.68 -81.9% HOLD
2026-09-14 86 $1,234.46 $206.68 -83.3% HOLD
2026-09-11 86 $1,186.08 $206.68 -82.6% HOLD
2026-09-10 86 $1,203.75 $206.68 -82.8% HOLD
2026-09-09 86 $1,218.50 $208.38 -82.9% HOLD
2026-09-08 86 $1,223.86 $208.38 -83.0% HOLD
2026-09-07 86 $1,223.86 $208.38 -83.0% HOLD
2026-09-04 86 $1,213.65 $208.38 -82.8% HOLD
2026-09-03 86 $1,219.36 $208.38 -82.9% HOLD
2026-09-02 86 $1,225.96 $208.38 -83.0% HOLD
2026-09-01 86 $1,267.77 $208.38 -83.6% HOLD
2026-08-31 86 $1,256.26 $208.38 -83.4% HOLD
2026-08-28 86 $1,311.08 $208.38 -84.1% HOLD
2026-08-27 86 $1,303.88 $208.38 -84.0% HOLD
2026-08-26 86 $1,304.15 $208.38 -84.0% HOLD
2026-08-25 86 $1,285.03 $208.38 -83.8% HOLD
2026-08-24 86 $1,316.28 $208.38 -84.2% HOLD
2026-08-21 86 $1,310.60 $208.38 -84.1% HOLD
2026-08-20 86 $1,300.14 $208.38 -84.0% HOLD
2026-08-19 86 $1,333.18 $208.38 -84.4% HOLD
2026-08-18 86 $1,402.01 $208.38 -85.1% HOLD
2026-08-17 86 $1,402.01 $208.38 -85.1% HOLD
2026-08-14 86 $1,362.55 $208.38 -84.7% HOLD
2026-08-13 86 $1,425.01 $208.38 -85.4% HOLD
2026-08-12 86 $1,402.11 $224.71 -84.0% HOLD
2026-08-11 86 $1,381.10 $224.71 -83.7% HOLD
2026-08-10 86 $1,401.54 $224.71 -84.0% HOLD
2026-08-07 86 $1,359.08 $224.71 -83.5% HOLD
2026-08-06 86 $1,345.46 $224.71 -83.3% HOLD
2026-08-05 86 $1,335.03 $224.71 -83.2% HOLD
2026-08-04 86 $1,426.03 $224.71 -84.2% HOLD
2026-08-03 86 $1,426.03 $224.71 -84.2% HOLD
2026-07-31 86 $1,316.18 $224.71 -82.9% HOLD
2026-07-30 86 $1,248.76 $224.71 -82.0% HOLD
2026-07-29 86 $1,339.08 $224.71 -83.2% HOLD
2026-07-28 86 $1,339.08 $224.71 -83.2% HOLD
2026-07-27 86 $1,397.15 $224.71 -83.9% HOLD
2026-07-24 86 $1,397.15 $224.71 -83.9% HOLD
2026-07-23 86 $1,398.45 $224.71 -83.9% HOLD
2026-07-22 86 $1,383.26 $224.71 -83.8% HOLD
2026-07-21 86 $1,328.80 $224.71 -83.1% HOLD
2026-07-20 86 $1,312.00 $224.71 -82.9% HOLD
2026-07-17 86 $1,305.65 $224.71 -82.8% HOLD
2026-07-16 86 $1,352.66 $224.71 -83.4% HOLD
2026-07-15 86 $1,291.38 $240.05 -81.4% HOLD
2026-07-14 86 $1,291.38 $240.05 -81.4% HOLD
2026-07-13 86 $1,352.74 $240.05 -82.3% HOLD
2026-07-10 86 $1,374.13 $240.05 -82.5% HOLD
2026-07-09 86 $1,315.51 $240.05 -81.8% HOLD
2026-07-08 86 $1,272.81 $240.05 -81.1% HOLD
2026-07-07 86 $1,346.13 $240.05 -82.2% HOLD
2026-07-06 86 $1,288.16 $240.05 -81.4% HOLD
2026-07-03 86 $1,288.16 $240.05 -81.4% HOLD
2026-07-02 86 $1,331.73 $240.05 -82.0% HOLD
2026-06-25 86 $1,434.95 $191.60 -86.6% STRONG SELL
2026-06-23 86 $1,423.76 $189.59 -86.7% STRONG SELL