David Swensen on Mistakes & Learning

We dis- cussed the various aspects of the Yale Model ranging from long- term horizons, the need to generate strong inflation-adjusted returns, diversification, asset allocation, alternative asset classes, alignment of interest, and partnering with extraordinary invest- ment managers. In essence we taught right from David’s book Pioneering Portfolio Management. In !""", when David first wrote that book, many wondered if it was a mistake to publish the playbook for the Yale Model. Why give away all of Yale’s intellectual property? Listening with amazement at the quality and thoughtfulness of our guests who had all been trained by David, I realize that the real secret ingre- dient was not just David’s conceptual framework for the invest- ment endowment portfolios, but vitally, his extraordinary invest- ment in people. The Yale Model needs highly intelligent, com- mitted, and selfless team players to excel. David’s investment in people—that is the secret sauce! !" ...he cared deeply about Yale, got such joy out of teaching classes and hearing back from students years later about their career, and deci- sions they needed to make.

A November 2011 piece on CBS News carried the headline that even Yale said to stop chasing investment returns, and used the headline to make a point about the behaviour of individual investors in the aftermath of the financial crisis. The article reported that David Swensen, the celebrated chief investment officer of the Yale endowment, had provided compelling evidence of investors behaving badly, in particular by buying high and selling low in their mutual fund allocations. The piece used the office's published research on mutual fund flows to argue that the average individual investor had underperformed the funds they owned because of the timing of their purchases and sales, and that the behaviour gap was the dominant source of the gap between the returns the funds produced and the returns the investors realised. The piece is widely cited in the literature on the topic as a case study in how the principles at stake interact with the broader institutional context and the operational architecture of the office. The coverage walked through Swensen's argument that the for-profit mutual fund industry consistently failed the individual investor, and that the structural incentives of the industry were at the root of the behaviour gap. The piece noted that Swensen had made the case, in his two books, that the individual investor should not try to replicate the institutional model but should instead use low-cost index funds to build a diversified portfolio, and that the case for index funds was a function of the structural disadvantage of the individual investor in the active-management marketplace. The coverage stressed that the argument was being made by the head of one of the most successful active-management operations in the country, which gave it particular weight in the broader debate over the case for index investing. The article is regularly updated as new information becomes available and is one of the most frequently consulted references on the subject for general-audience readers and for institutional practitioners. The piece closed with a reflection on what the office's research implied for the individual investor's behaviour. The CBS coverage noted that the discipline of rebalancing against the market rather than with it, the discipline of holding a long-horizon allocation through market cycles, and the discipline of using low-cost index funds rather than chasing performance were the three practical implications of the office's argument. The article is paired in the Swensen bibliography with the Unconventional Success volume that articulated the argument in full, and it is widely cited in the secondary literature on the behaviour gap and on the case for index investing. The piece remains a reference for general-audience readers looking for an accessible introduction to the argument and its practical implications. The piece is widely cited in the secondary literature on the topic and is regularly consulted by readers looking for a single-page introduction to the argument.

Swensen's ECON 252 lecture devoted significant attention to the critique of his own approach that had been published in Barron's magazine after the 2008 drawdown. The article had argued that the endowment model had failed because the Yale endowment experienced a roughly 25 percent drawdown during the financial crisis. Swensen's response in the lecture was twofold: first, that the drawdown was less severe than the drawdowns experienced by institutions with conventional equity-heavy allocations; second, that the relevant measure of the model's success was the long-cycle compound return, not the year-to-year mark-to-market drawdown. Swensen was also careful in the lecture to acknowledge the limits of the model. He argued that the endowment approach is poorly suited to institutions without the staff to evaluate external managers, the governance to maintain the strategic allocation through cycles, and the long horizon to commit capital through multiple vintage years. The model, in his framing, is a framework for institutions with specific structural advantages - and applying it to institutions without those advantages produces high fees and mediocre returns rather than the long-cycle outperformance the Yale endowment has achieved. The lecture closed on the distinction between speculation and investment, a theme Swensen returned to throughout the talk. He argued in the lecture that the speculative activity of trying to time market moves is fundamentally different from the investment activity of constructing a portfolio of risk premiums that compound real wealth over a long horizon. The endowment model is, in this framing, an explicit rejection of speculation in favor of disciplined portfolio construction - and the long-cycle returns of the Yale endowment are presented as the empirical evidence that the investment approach outperforms the speculative approach over full market cycles.