Gregory Blotnick
Investment professional Gregory J. Blotnick was born in New York City in 1986. He spent his formative years in Cambridge, Massachusetts, where he attended Buckingham Browne & Nichols School and graduated in 2005.
Early Life
He went on to earn a Bachelor of Science in Finance from Lehigh University in 2009, graduating amidst the global financial crisis, an experience that profoundly shaped his perspective on economic cycles. He became a CFA Charterholder in 2012. In 2014, he completed his MBA at Columbia Business School. There, Blotnick’s academic focus gravitated toward security analysis, portfolio management, and investor psychology, topics that would become central to his later writing. He studied under several influential finance professors and immersed himself in the study of behavioral economics, particularly the cognitive biases that plague even the most seasoned professionals.
Investing Career
Blotnick began his professional investment career as an equity analyst at Doubloon Capital, a Connecticut-based hedge fund. His responsibilities included conducting in-depth fundamental research, building financial models, and identifying long and short investment opportunities across the Consumer sector. His analytical skill and sector-specific expertise led him to subsequent roles at Exis Capital and North Elm Capital in New York City, where he further honed his investment philosophy and approach to equity analysis.
In 2017, Blotnick was recruited by Citadel LLC, one of the world’s most prominent investment firms. As a Consumer sector specialist, he became part of a high-performing investment team responsible for managing a $1 billion market-neutral portfolio. His mandate involved deep industry research and a nuanced understanding of both macroeconomic trends and company-specific dynamics.
Building on a decade of investing experience, Blotnick launched Brattle Street Capital LLC in 2019, an investment firm focused on long/short equity within the small- and mid-cap Consumer universe. The firm took a disciplined, research-intensive approach to identifying mispriced securities, with a particular emphasis on structural change, market dislocations, and behavioral inefficiencies. The firm is named after Brattle Street in Cambridge, the same street where Blotnick grew up, in a subtle nod to his roots.
Writing Portfolio
Gregory Blotnick’s writing career began in 2012 under the pseudonym Brattle Street Capital, a moniker that quickly gained traction in the online investing community. His Twitter handle, @brattlestcap, became a go-to source for sharp commentary and was recognized as a “must-follow” by both Business Insider and Forbes for its blend of market insight, wit, and psychological nuance. Over the past decade, his byline has appeared in a wide range of respected financial and business publications, including Forbes, Fortune, Kiplinger, NewsMax, MarketWatch, CFA Institute, Seeking Alpha, and others. His writing often explores the intersection of investing and psychology, with a strong emphasis on behavioral finance, as in the study of how human emotion and cognitive biases interfere with rational decision-making. Blotnick’s research goes beyond surface-level commentary, delving into topics like overconfidence, confirmation bias, herd behavior, and loss aversion, not only as they apply to markets but as broader metaphors for life and leadership.
Blotnick’s debut memoir, Blind Spots: A Riches to Rags Story, is a candid and deeply personal account of ambition, failure, and the blind spots that even highly educated professionals can overlook. The memoir chronicles his personal and professional journey, offering a brutally honest reflection on hubris, denial, and the psychological traps that can lead smart people astray. It has been praised for its vulnerability, depth, and insight by outlets including Kirkus Reviews, The US Review of Books, and Manhattan Book Review. He is also the author of "Essays: De Rerum Natura," a collection of thirty philosophical essays.
Today, Gregory Blotnick continues to write and speak publicly on topics at the intersection of investing, psychology, ethics, and personal development. He emphasizes the importance of self-awareness, humility, and emotional intelligence in navigating both markets and life. Through his ongoing work, Blotnick challenges audiences to examine their own blind spots and internal narratives, arguing that unchecked ego, not lack of knowledge, is often the true root of professional downfall. In addition to his writing, he remains active in the investment community and consults selectively on matters of strategy, behavioral risk, and narrative-driven investing. You can find him on Facebook or Instagram.