Founder & CEO
A software engineer, inventor, and handyman, Marco was introduced to computers at an early age while attending a boarding school in the Swiss Alps. He was the only one to request to be in the computer lab when a shiny new Apple II arrived rather than participate in the skiing outings. After stints at prestigious investment firms like Citadel, he began thinking of ways to automate the repetitive task of managing a strategy. That work eventually became Portfolio123.
Marc H. Gerstein
Director of Research & Author
A former lawyer, Marc has spent his career analyzing stocks, educating investors and helping to develop stock screening platforms at Value Line, Reuters, and various websites.
His commentary can be found on
He has authored two books Screening the Market (Wiley, 2002) and The Value Connection (Wiley 2003), and is presently working on a new book about investing strategy design and a satirical novel with a Wall Street setting when he is able to find some time.
Head of RIA
Former banker at Northern Trust and researcher for an investment research app he co-founded, Hem has experience in both worlds. After partnering with a friend to start a financial research app, he started managing client investment accounts before coming onboard with Portfolio123 to kickstart the RIA department. He has a very curious personality and enjoys learning new things every day. He's a strong follower of the motto “work hard, play hard” and “Give 100% to everything!”
Business Analyst & Trading
Riccardo began trading securities before graduating high school, and won the collegiate European University Trading Challenge. As a BS in Economics of Financial Institutions, he is not only experienced at investment strategies, but also business analysis and macroeconomics. Moreover, he contributed to the venture of an Italian start-up which focused on the deployment of blockchain technology on transfers of credit assets between financial institutions.
Head of Customer Service
Paul has worked at several companies over the years, as an analyst, a writer, an editor, and a financial data expert. Those companies included Oppenheimer, Value Line, Multex.com, and Reuters. Paul also holds an MBA in Finance, Economics and International Business from New York University, where his coursework included economic history, which he frequently uses to help people in examining their Portfolio123 systems.
Head of Software Technology
Ted graduated from University of Minnesota and has been leading Portfolio123's software technology since the company's beginning. His everyday efforts have led Portfolio123 to become the advanced research platform it is today.
Yuval invests primarily in microcaps; investigates investment conundrums; and writes about his investigations on his blog, invest(igations)
and on Seeking Alpha
. He worked for thirty years as an editor at publishing houses in New York City and Chicago. He is the author of Zora and Langston: A Story of Friendship and Betrayal (Norton, 2019) and other books.