Mark J. Walsh may not have been an official Turtle, but this close associate of Richard Dennis has had a long and successful ride. He is a second-generation Turtle who trained with Dennis directly as well as with original Turtles Craig Soderquist, Brian Proctor, and Jeff Gordon. His firm, Mark J. Walsh and Company, carried the trend following methodology forward into the generation after the original program, demonstrating once again that the edge Dennis built and taught was transmissible beyond the first cohort he selected.
In 1993, a year when the managed futures industry’s top performers read like a fan club list for Dennis alumni, Walsh scored a 78.1 percent return. That placed him alongside William Eckhardt‘s 56 percent return and near the top of a group that included Jerry Parker‘s Chesapeake Capital and John W. Henry‘s 69 percent JWH Global Strategies fund. It was a year that confirmed the Turtle methodology’s durability across market environments and across generations of practitioners.
The Second-Generation Transmission Model
Walsh’s development as a trader illustrates exactly what the turtletrader.com site documents across its family tree page: that trend following knowledge propagates through apprenticeship just as effectively as through formal programs. Dennis trained the first cohort directly. That cohort, in turn, trained a second generation. Soderquist trained Ken Jakubzak. Gordon trained Walsh. Proctor also assisted in Walsh’s development. The methodology moved through these relationships with its core principles intact, even as individual practitioners added their own refinements and adaptations.
That chain of transmission is one of the most important structural features of the Turtle legacy. Paul Rabar produced Jeff Izenman. Jerry Parker‘s Chesapeake Capital mentored Salem Abraham. The pattern is consistent: the practitioners who absorbed the methodology most deeply became capable of passing it on, and those who received it from them built operations that further extended the reach of what Dennis had started. Walsh is one of the clearer examples of that second-generation success.
The 1993 Context
The 1993 trading environment was one of the periods when systematic trend following demonstrated its value most clearly. Currencies were volatile, interest rates were moving, and the managers who had the discipline to follow systematic signals through the noise captured substantial returns. A Futures magazine article from that period described the top ten advisors with more than ten million dollars under management as reading like a Dennis fan club list. Walsh’s 78.1 percent that year placed him in that company, validating both his individual execution and the methodology he had inherited through the second-generation transmission chain.
The same article highlighted a key insight Walsh carried from the Turtle tradition: the critical factor in trading is not entry timing or indicator selection but money management. As Walsh articulated it, focusing on how risk is divided across the portfolio, how much is taken in each market, and how many contracts are traded in each market is what really counts. Once money management is working correctly, volatility can be used to advantage rather than feared, because it has no necessary correlation with the risk of ruin when position sizing is handled correctly. That formulation is the Turtle framework expressed in Walsh’s own words, drawing the direct line from what Eckhardt and Dennis taught to how second-generation practitioners internalized and applied it.
What Walsh’s Career Adds to the Story
The original Turtle experiment proved that trading could be taught to people with no prior experience in two weeks. The success of the first-generation Turtles proved the methodology worked across a diverse group of practitioners. Walsh’s career adds a third proof point: the methodology could be transmitted through the second generation with sufficient fidelity to produce results that matched the best of the first cohort in the right market environment.
That chain of proof is ultimately what makes the Turtle experiment significant beyond the original participants. Dennis was not trying to produce 23 successful traders. He was testing a thesis about whether trading excellence was teachable. Walsh, Jakubzak, Abraham, and the other second-generation practitioners confirmed the thesis at a remove, demonstrating that the knowledge was not uniquely tied to Dennis’s direct instruction but was genuinely transmissible through the practitioners he had trained.
Frequently Asked Questions
Who is Mark J. Walsh?
Mark J. Walsh is a second-generation Turtle and close associate of Richard Dennis. He trained with Dennis directly and with original Turtles Craig Soderquist, Brian Proctor, and Jeff Gordon. He runs Mark J. Walsh and Company and posted a 78.1 percent return in 1993, placing him among the top trend following managers of that year.
Was Mark J. Walsh an official Turtle?
Walsh was not part of the original Turtle selection and training program. He is described as a close associate of Dennis and a second-generation Turtle who received his training through a combination of direct contact with Dennis and mentorship from original Turtles including Soderquist, Proctor, and Gordon.
What is Mark J. Walsh and Company?
Mark J. Walsh and Company is Walsh’s systematic trend following trading firm. It carried the Turtle methodology forward into the second generation of practitioners who trained under and alongside the original program participants.
What does Walsh say about money management?
Walsh has described money management as the critical factor in trading, more important than entry timing or indicator selection. His articulation focuses on how risk is allocated across the portfolio: how much is taken in each market and how many contracts are traded. Once money management is correctly structured, volatility becomes an advantage rather than a threat because it does not correlate with the risk of ruin when position sizing is properly handled.
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