Monolithic Power Systems vs eBay
Power management chip designer for data centers and automotive vs Global online marketplace for new and used goods. Which is the better buy for your portfolio in September 2026? Plain-English answer below.
Monolithic Power Systems designs high-performance power semiconductors for AI servers and electric vehicles while eBay runs a marketplace where hundreds of millions of buyers and sellers trade everything from sneakers to vintage electronics. One captures the silicon layer of the AI infrastructure buildout; the other monetizes the long tail of global e-commerce. Monolithic Power Systems vs eBay draws a contrast between a fabless chip designer growing into AI tailwinds and a mature platform defending market share against Amazon and Shopify, helping readers understand how growth reinvestment, gross margin structure, and capital intensity differ sharply between the two.
Monolithic Power Systems designs high-performance power semiconductors for AI servers and electric vehicles while eBay runs a marketplace where hundreds of millions of buyers and sellers trade everyth...
Why It’s Moving
MPWR swings as Nvidia supplier uncertainty collides with fresh institutional support.
- On September 14, an Edgewater Research report raised concerns that Monolithic Power Systems could lose supplier business on Nvidia’s next-generation Blackwell platform, potentially putting part of its future AI revenue opportunity under pressure.
- Shares fell 7.39% that day despite the lack of confirmed evidence of a supplier change, showing how sensitive the stock has become to developments involving major AI customers.
- Bank of America disclosed a new position worth about $741 million on September 16, while Monolithic Power declared a $2-per-share quarterly dividend, providing institutional and cash-return support amid elevated volatility.
Jefferies Downgrades eBay Outlook as GameStop's Acquisition Pressure Mounts
- Bearish Analyst Action: Jefferies reiterated an 'Underperform' rating and lowered its price target to $75, citing slowing advertising growth and a reliance on lower-margin offerings that are expected to weigh on profitability.
- Activist Pressure Intensifies: GameStop CEO Ryan Cohen purchased one million shares of his own company personally, signaling strong conviction in the ongoing effort to acquire eBay, while three other directors also bought stock during the same week.
- Executive Selling & Timeline Risks: eBay CFO Peggy Alford sold 2,716 shares in a tax-related transaction, coinciding with reports that GameStop’s acquisition warrants are nearing expiration, adding urgency to the corporate battle.
MPWR swings as Nvidia supplier uncertainty collides with fresh institutional support.
- On September 14, an Edgewater Research report raised concerns that Monolithic Power Systems could lose supplier business on Nvidia’s next-generation Blackwell platform, potentially putting part of its future AI revenue opportunity under pressure.
- Shares fell 7.39% that day despite the lack of confirmed evidence of a supplier change, showing how sensitive the stock has become to developments involving major AI customers.
- Bank of America disclosed a new position worth about $741 million on September 16, while Monolithic Power declared a $2-per-share quarterly dividend, providing institutional and cash-return support amid elevated volatility.
Jefferies Downgrades eBay Outlook as GameStop's Acquisition Pressure Mounts
- Bearish Analyst Action: Jefferies reiterated an 'Underperform' rating and lowered its price target to $75, citing slowing advertising growth and a reliance on lower-margin offerings that are expected to weigh on profitability.
- Activist Pressure Intensifies: GameStop CEO Ryan Cohen purchased one million shares of his own company personally, signaling strong conviction in the ongoing effort to acquire eBay, while three other directors also bought stock during the same week.
- Executive Selling & Timeline Risks: eBay CFO Peggy Alford sold 2,716 shares in a tax-related transaction, coinciding with reports that GameStop’s acquisition warrants are nearing expiration, adding urgency to the corporate battle.
Investment Analysis
Pros
- Monolithic Power Systems reported record Q2 2025 revenue of $664.6 million, marking a 31% year-over-year growth.
- The company focuses on innovative AI ASIC-based power solutions and advanced data center systems, positioning well in high-growth tech sectors.
- It has a strong profitability profile with a net margin over 70% and stable return on equity around 19%.
Considerations
- Despite strong revenue growth, the stock price declined slightly after the Q2 2025 earnings announcement, indicating possible market concerns.
- The stock trades at a high valuation with a forward P/E ratio over 50, reflecting investor expectations that may be difficult to meet.
- Monolithic Power holds a relatively small market share in the power management chip industry and faces stiff competition from larger, established players.
eBay
EBAY
Pros
- eBay maintains a strong global e-commerce platform with a large active user base, providing steady transaction volumes.
- The company continues to generate healthy free cash flows and maintains a disciplined cost management approach supporting profitability.
- Recent strategic initiatives focus on enhancing AI-driven personalisation and expanding seller services to boost marketplace engagement.
Considerations
- Growth is constrained by increasing competition from larger e-commerce rivals and shifting consumer preferences towards direct-to-consumer platforms.
- eBay faces regulatory scrutiny and macroeconomic uncertainties that could impact cross-border transactions and advertising revenue.
- Its marketplace business model is highly cyclical and sensitive to fluctuations in consumer discretionary spending and global economic conditions.
Monolithic Power Systems (MPWR) Next Earnings Date
MPWR’s next earnings release is currently expected on October 29, 2026. The report is expected to cover the third quarter of fiscal 2026. The date remains an estimate based on the company’s historical reporting pattern and may be revised when formally confirmed.
eBay (EBAY) Next Earnings Date
eBay’s next earnings report is currently scheduled for October 27, 2026. The release is expected to cover the fiscal third quarter of 2026, ended September 30. The date remains subject to confirmation by the company.
Monolithic Power Systems (MPWR) Next Earnings Date
MPWR’s next earnings release is currently expected on October 29, 2026. The report is expected to cover the third quarter of fiscal 2026. The date remains an estimate based on the company’s historical reporting pattern and may be revised when formally confirmed.
eBay (EBAY) Next Earnings Date
eBay’s next earnings report is currently scheduled for October 27, 2026. The release is expected to cover the fiscal third quarter of 2026, ended September 30. The date remains subject to confirmation by the company.
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