Yiannis Zourmpanos
160 Articles
Yiannis Zourmpanos specializes in asymmetric investments, identifying high-upside opportunities with minimal downside risk. He previously worked for Deloitte and KPMG in external and internal auditing and consulting. Yiannis is a Chartered Certified Accountant, and a Fellow Member of ACCA Global. He holds BSc and MSc degrees from leading U.K. business schools.
Written by Yiannis Zourmpanos
Reviewed by Yiannis Zourmpanos
Investing in Energy Stocks
TradingKey - When investors consider investing in energy, they think about oil wells and pumping gasoline. But the 2025 storyline is bigger, and stealthier. Energy today is as much about geopolitics and climate policy as about barrels and pipelines, about massive shifts in the way the world...
Fri, Jul 11
Sequoia Fund Inc: Quiet Conviction in a Noisy Market
TradingKey - Few mutual funds have a following as cultlike as that of the Sequoia Fund (SEQUX). Once synonymous with legendary manager Bill Ruane, and thereafter with Robert Goldfarb, Sequoia became known for not playing Wall Street's short game.
Fri, Jul 11
Renaissance Technologies: Inside the Machine of Quantitative Mastery
When Jim Simons launched Renaissance Technologies in 1978, he probably recognized it wouldn’t be like any traditional Wall Street firm. A brilliant mathematician who used to break codes, Simons helmed a radically different kind of quantitative investment.
Fri, Jul 11
Investing in Healthcare Stocks
TradingKey - While a technology- and energy-driven market dabbles into a simmering undercurrent life for healthcare, under the radar exists an industry ripe with growth potential, defensive capability, and continued innovation waves. Long-term investors experience a delicious mix of safety and...
Thu, Jul 10
Investing in Tech Stocks
TradingKey - Tech shares have never failed to inspire passionate true believers and skeptical naysayers. After all, many major players find themselves on price-to-earnings multiples that are high by historical standards. The Nasdaq 100 sits roughly a multiple ahead that makes value players gasp...
Thu, Jul 10
Walgreens: Discount or Deadweight?
Q3 2025 retail pharmacy revenue rose 7.8% to $30.7 billion, but front-end sales declined 5.3% year-over-year. Operating cash flow for nine months was only $245 million, with free cash flow at negative $506 million.
Mon, Jul 7
Nike’s Playbook Faces Real Pressure
TradingKey - In a year where global sports brands face inventory builds and fluid consumer behavior, Nike’s (NKE) recent earnings release reveals an uncomfortable reality: even an icon is not immune to cyclical drag and self-generated execution risk. Revenues fell 10% to $46.3 billion for fiscal...
Fri, Jul 4
Micron’s AI Bet Pays Off
TradingKey - Q3 2025 was a turning point that most industry participants still don't comprehend. For decades, Micron (MU) lived and breathed a cyclical commodity-driven memory cycle, but recent trends suggest a structural shift towards becoming an AI infrastructure anchor. Revenue surged to a new...
Fri, Jul 4
Inside SoFi’s Capital-Light Machine
SoFi is a high-beta, capital-lite fintech prototype that is only starting to show robust earnings leverage. But conviction in its platform economics will be tested by predictable growth in fee-based revenues, expanding cross-sell ratios, and cushioned balance sheet capacity to absorb shocks without
Fri, Jul 4
George Soros’s Playbook in 2025: Opportunistic, Nimble, and Undeniably Contrarian
TradingKey - When ordinary investors hear George Soros's name, it evokes that hedge fund legend who “broke the Bank of England,” but today Soros Fund Management trades with a system that is far more complicated than speculating in currencies.
Fri, Jul 4
Oscar Health’s Unexpected Profit Surge
TradingKey - Oscar Health (OSCR) assembled an unlikely reversal with 42% YoY revenue growth to $3.05 billion in Q1 2025 and net income of $275 million, which represents a remarkable $98 million year-over-year improvement.
Thu, Jul 3
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Intel’s Quiet Reinvention Gains Speed
TradingKey - At $22.55 per share, Intel (INTC) isn’t trading like an IT titan; it’s trading like a value trap. And yet, underneath the hood, a monumental shift is occurring quietly.
Thu, Jul 3
AST SpaceMobile: The Satellite Startup Betting Big
TradingKey - AST SpaceMobile (ASTS) is racing toward something as ambitious as any space-based telecom: developing the first space-based cellular broadband net that directly interfaces with commercial smartphones.
Thu, Jul 3
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OppFi: The Fintech Profit Story You Missed
TradingKey - While most are reassured by the frenzy of fintech hype cycles and software spec multiples, OppFi Inc. (OPFI) is an exception, an undervalued, profitable, and capital-efficient digital lender with record-breaking Q1 2025 results that defy conventional wisdom.
Thu, Jul 3
Adobe’s AI Play Is Working
TradingKey - Adobe (ADBE) enters the latter part of FY2025 with strategic momentum: its own ongoing transition into an AI-first platform business.
Thu, Jul 3
Oracle’s AI Pivot Hits Overdrive
Oracle’s (ORCL) FY2025 earnings and FY26 guidance present an interesting picture of a company in high-end transformation, from legacy software colossus to capital-intensive, vertically integrated AI infrastructure and cloud leader.
Thu, Jul 3
Broadcom’s Quiet Software Power Grab
TradingKey - Broadcom Inc. (AVGO) is at the crossroads between two revolutionary trends: hyperscale AI infrastructure and enterprise software unification due to VMware.
Thu, Jul 3
DocuSign: This SaaS Giant Is Reinventing Itself
TradingKey - Docusign reported a 29.5% non-GAAP operating margin and 30% free cash flow margin in Q1 FY26. The Intelligent Agreement Management (IAM) platform surpassed 10,000 customers and aims to reach double-digit subscription contribution by year-end.
Wed, Jul 2
The Fortress Portfolio: How Bill Gates Quietly Built a $42B Mission-Aligned Empire
TradingKey - Through March 31, 2025, Bill Gates' portfolio under the Bill & Melinda Gates Foundation Trust held 25 equity stakes with an aggregate market value of $41.81 billion.
Tue, Jul 1
Inside Nvidia’s Investment Blueprint: Mapping the Next Empire of AI, Automation, and Infrastructure
TradingKey - Nvidia (NVDA) is no longer just the leader of GPU chips, the company is transforming into something more. As the company heads towards the much-awaited annual shareholder meet, a sharper mental picture comes as to what exactly it’s building: an empire beyond silicon.
Wed, Jun 25
