David Booth, one of the best-known investors in the world, founded Dimensional Fund Advisors (DFA) along with Rex Sinquefield and brought asset-class investing, a description that embraces both index funds and the index-based but value-added strategy that DFA pursues, to individual investors as well as institutions. David, who received a PhD from the University of Chicago’s Graduate School of Business, also made the largest donation in the University of Chicago’s history and, in recognition of that gift, the university renamed its business school the Booth School of Business.

In building DFA, David pioneered the use of finance academics as advisors and board members. Eugene Fama, the Nobel Prize-winning economist associated with the efficient market hypothesis, was his dissertation chairman, an early investor in DFA, and a current director of the firm. Other noted academics associated with the firm include Robert Merton, Roger Ibbotson, and Kenneth French.

In Part 1 of his interview, Booth joins Larry Siegel to reflect on the academic revolution that reshaped investing, the launch of Dimensional’s first small-cap strategies, and the challenges of selling a new idea to skeptical markets at a time when index and index-like funds were in its infancy. He shares stories from the University of Chicago’s golden age of financial economics and explains why investing in an index with an eye to adding value through trading and inventory management – not strictly passive indexing – became Dimensional’s guiding philosophy.