MPWR · MONOLITHIC POWER SYSTEMS INC

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Monolithic Power Systems, Inc. provides semiconductor-based power electronics solutions in China, Taiwan, South Korea, Southeast Asia, Europe, the United States, Japan, and internationally. The company offers direct current (DC) to DC solutions to convert and control voltages within a range of electronic systems, such as cloud-based and on-premises CPU servers and workstations, AI systems, memory, storage solutions, notebooks, infotainment, power sources, home appliances, network infrastructure, and satellite communications. It also provides alternating current (AC) to DC; driver metal-oxide-semiconductor field-effect transistors; power management integrated circuits (ICs); and current limit switch and lighting control products.

Close · 3M

-25.64%

Held by 2 AI ETFs

PQUS0.500%

as of Sep 1

AMOM0.010%

as of Sep 2

Signal performance

Each tracked ETF's moves on this stock, grouped by fund. Returns are measured from the signal date to the latest close — hypothetical, no commissions or slippage.

Buy signals9

Win rate0% (0/9)

Avg buy return-13.44%

PQUSnow 0.500% of fund15 signals

PQUS · Weight decrease · 2d

weight 0.560% → 0.520% (-0.040 pp)·stock up 7.4% in the 30 days before

Aug 15·entry $1415.99·now $1213.65

-14.29%

since Aug 15

PQUS · Weight decrease · 2d

weight 0.640% → 0.540% (-0.100 pp)·stock up 2.0% in the 30 days before

Aug 7·entry $1401.54·now $1213.65

-13.41%

since Aug 7

PQUS · Weight increase · 2d

weight 0.580% → 0.640% (+0.060 pp)·stock up 7.1% in the 30 days before

Aug 2·entry $1344.37·now $1213.65Fresh

-9.72%

since Aug 2

PQUS · Accumulation · 5d

weight 0.580% → 0.630% (+0.050 pp)·stock down 7.0% in the 30 days before

Jul 25·entry $1339.08·now $1213.65Fresh

-9.37%

since Jul 25

PQUS · Weight increase · 3d

weight 0.590% → 0.620% (+0.030 pp)·stock down 7.0% in the 30 days before

Jul 24·entry $1333.81·now $1213.65Fresh

-9.01%

since Jul 24

PQUS · Weight increase · 2d

weight 0.590% → 0.610% (+0.020 pp)·stock down 1.9% in the 30 days before

Jul 23·entry $1397.15·now $1213.65Fresh

-13.13%

since Jul 23

PQUS · Weight increase · 2d

weight 0.560% → 0.600% (+0.040 pp)·stock down 12.5% in the 30 days before

Jul 17·entry $1312.00·now $1213.65Fresh

-7.50%

since Jul 17

PQUS · Weight increase · 2d

weight 0.600% → 0.630% (+0.030 pp)·stock down 20.7% in the 30 days before

Jul 2·entry $1288.16·now $1213.65Fresh

-5.78%

since Jul 2

PQUS · Weight decrease · 2d

weight 0.690% → 0.640% (-0.050 pp)·stock down 13.5% in the 30 days before

Jun 25·entry $1438.30·now $1213.65

-15.62%

since Jun 25

PQUS · Weight decrease · 2d

weight 0.730% → 0.650% (-0.080 pp)·stock up 6.5% in the 30 days before

Jun 19·entry $1537.88·now $1213.65

-21.08%

since Jun 19

PQUS · Weight decrease · 2d

stock down 4.4% in the 30 days before

Jun 12·entry $1577.32·now $1213.65

-23.06%

since Jun 12

PQUS · Weight decrease · 2d

stock down 10.4% in the 30 days before

Jun 7·entry $1559.18·now $1213.65

-22.16%

since Jun 7

PQUS · Weight decrease · 2d

stock up 2.6% in the 30 days before

May 21·entry $1561.25·now $1213.65

-22.26%

since May 21

PQUS · Weight decrease · 2d

stock up 10.5% in the 30 days before

May 17·entry $1486.33·now $1213.65

-18.35%

since May 17

PQUS · Weight decrease · 2d

stock up 52.3% in the 30 days before

Apr 29·entry $1526.84·now $1213.65

-20.51%

since Apr 29

AMOMnow 0.010% of fund12 signals

AMOM · Weight decrease · 2d

weight 0.480% → 0.010% (-0.470 pp)·stock down 8.7% in the 30 days before

Sep 2·entry $1219.36·now $1213.65

-0.47%

since Sep 2

AMOM · Weight decrease · 2d

weight 0.510% → 0.480% (-0.030 pp)·stock down 6.0% in the 30 days before

Aug 19·entry $1300.14·now $1213.65

-6.65%

since Aug 19

AMOM · Weight decrease · 2d

weight 0.530% → 0.500% (-0.030 pp)·stock up 0.7% in the 30 days before

Aug 13·entry $1362.55·now $1213.65

-10.93%

since Aug 13

AMOM · Weight increase · 2d

weight 0.030% → 0.530% (+0.500 pp)·stock up 2.0% in the 30 days before

Aug 7·entry $1401.54·now $1213.65Fresh

-13.41%

since Aug 7

AMOM · Sudden change · 1d

weight 0.030% → 0.520% (+0.490 pp)·stock up 3.3% in the 30 days before

Aug 6·entry $1359.08·now $1213.65

-10.70%

since Aug 6

AMOM · Weight decrease · 2d

weight 0.280% → 0.250% (-0.030 pp)·stock down 18.9% in the 30 days before

Jun 26·entry $1313.32·now $1213.65

-7.59%

since Jun 26

AMOM · Weight decrease · 2d

weight 0.290% → 0.270% (-0.020 pp)·stock down 8.8% in the 30 days before

Jun 23·entry $1423.76·now $1213.65

-14.76%

since Jun 23

AMOM · Weight decrease · 2d

weight 0.310% → 0.280% (-0.030 pp)·stock down 2.6% in the 30 days before

Jun 17·entry $1448.21·now $1213.65

-16.20%

since Jun 17

AMOM · Weight increase · 2d

stock up 7.4% in the 30 days before

Jun 3·entry $1689.89·now $1213.65Fresh

-28.18%

since Jun 3

AMOM · Sudden change · 1d

stock up 2.6% in the 30 days before

Jun 2·entry $1624.99·now $1213.65

-25.31%

since Jun 2

AMOM · Weight decrease · 2d

stock up 40.7% in the 30 days before

May 4·entry $1573.30·now $1213.65

-22.86%

since May 4

AMOM · Weight increase · 2d

stock up 47.7% in the 30 days before

Apr 30·entry $1614.41·now $1213.65Fresh

-24.82%

since Apr 30

Sell signals show what the stock did after the AI exited. A negative number means the AI's exit was well-timed.

Buffett-style framework

Too hard to callas of Aug 16

AI ETFs show mixed activity for MONOLITHIC POWER SYSTEMS, with some funds demonstrating both increase and decrease trends in their holdings recently. The framework's 'Too Hard' verdict, however, indicates that the company's long-term predictability is questionable, suggesting that active positions by AI funds carry a higher inherent risk from this value-investing perspective.

Circle of CompetenceThe semiconductor industry, characterized by rapid technological cycles and intense competition, makes projecting stable unit economics and cash flows for ten years inherently difficult.
Economic MoatThis stage is not applicable as the company falls outside the circle of competence.
ManagementThis stage is not applicable as the company falls outside the circle of competence.
Financial HealthThis stage is not applicable as the company falls outside the circle of competence.
Margin of SafetyThis stage is not applicable as the company falls outside the circle of competence.

MONOLITHIC POWER SYSTEMS operates in the semiconductor industry, a sector prone to rapid technological change and competitive shifts that hinder the reliable projection of unit economics and cash flows for a decade. Consequently, the business is deemed 'Too Hard' to evaluate within this framework, precluding any meaningful assessment of its economic moat, management quality, financial health, or margin of safety. Without predictable earning power, a confident investment decision cannot be made using this analytical approach.

Educational interpretation generated by AI applying frameworks Warren Buffett documented in his shareholder letters and other public writings. Not a statement by Mr. Buffett or Berkshire Hathaway, and not investment advice.