Rational Invest is an independent Robo-Advisor implementing investment solutions through a range of systematic, rule-based strategies. Rational Invest was founded in March 2015 and is based in Zürich, Switzerland.

The firm’s investment strategies are based on the innovative quantitative algorithms of Logical Invest, founded by Frank Grossman in 2011.


Walter J Baumann

Co-founder / Chairman
Walter has over 35 years of experience in investment banking across all trading products and processes with a background in equity and derivatives trading.

Frank Grossmann

Co-founder / Chief Investment Officer
Frank has a long track record as a successful entrepreneur. He is the founder of Logical Invest, a research firm specialized in the development of mathematical, rule-based investment strategies.