David Rewcastle is a respected financial analyst based in Darien, Connecticut, with a specialty in energy equity and fixed income. With decades of experience and a deep understanding of the energy and utilities sector, David has made a name for himself through careful analysis, consistent performance, and strategic foresight. As the Senior Partner/Analyst at E3 Research Associates, he offers consulting services that help clients make well-informed, high-impact decisions.
We spoke with David to gain insight into his career, his approach to success, and the trends that keep him inspired.
How do you define success and how long did it take you to find it?
Success, to me, is about consistency and long-term value. It’s not about one big win, but about staying on course through changing markets and delivering reliable insights that help clients succeed. It took time—years of study, setbacks, and progress. But with patience and discipline, success became less of a milestone and more of a way of working.
What are the qualities of a good entrepreneur?
Curiosity and resilience. A good entrepreneur is always asking questions and looking for opportunities. But more importantly, they keep going when things don’t work out. Markets change. Assumptions break. But persistence, paired with the ability to adapt, keeps entrepreneurs moving forward.
What challenges did you have to overcome at the beginning of your journey?
Early on, it was about credibility. The financial world is built on trust, and you have to earn that over time. I also had to develop my own voice—figuring out how to deliver opinions that are both clear and supported by data. There’s a balance between bold ideas and grounded analysis, and finding that balance was key.
What’s one trend that excites you?
The evolving energy landscape. Renewables, electric vehicles, and grid modernization are all shifting how we think about energy as an asset class. These shifts bring volatility, but also opportunity. Understanding the economics behind the energy transition is both exciting and necessary for anyone in finance today.
What advice would you give your younger self?
Ask more questions. Don’t be afraid to challenge assumptions—even your own. Early in my career, I focused on absorbing everything. But I’ve learned that progress often comes from questioning the things we think we already know.
What is one habit that helps you be productive?
Staying organized with information. I keep track of market data, news, and analysis in a structured way. That helps me spot patterns faster and stay ahead of emerging risks. Productivity is really about preparation.
When you feel overwhelmed or unfocused, what do you do?
I step away. Even a short walk or quiet moment can reset your thinking. The key is to recognize when you’re not thinking clearly—and give yourself permission to pause. That’s when the best insights often surface.
Takeaway
David Rewcastle’s perspective is grounded in experience and shaped by the dynamic world of energy finance. His ability to adapt, stay focused, and lead with informed curiosity has made him a trusted voice in his field. Whether advising companies or teaching students, David continues to blend analytical precision with practical insight.
His story serves as a reminder that long-term success is built on steady habits, thoughtful risk-taking, and a genuine interest in understanding how the world works.
Want to read more about David? Visit his website.
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