Kenneth Lawrence Fisher is an American billionaire investment analyst, author, and the founder and executive chairman of Fisher Investments, a fee-only financial adviser. Fisher's Forbes "Portfolio Strategy" column ran from 1984 to 2017, making him the longest continuously running columnist in the magazine's history. Fisher is now known for writing monthly, native language columns in international outlets. Fisher has authored eleven books on investing, and research papers in the field of behavioral finance. In 2010, he was included in Investment Advisor magazine's "30 for 30" list of the 30 most influential people in the investment advisory business over the last 30 years. As of January 2026, his net worth was estimated at $13.2 billion.

Kenneth Fisher — Wikipedia