Beating the market with skill, rather than luck, is so hard that it's arguably impossible. A strong working approximation is that markets are efficient - that prices reflect available information almost instantaneously. Accordingly, we have failed often. But our success building quantitative investment systems has been great - most notably with a hedge fund that beat the S&P-500 every year for a decade, with only 2/3rds the risk (volatility). Dr. John Elder will highlight key lessons learned from the long battle, and how those insights have helped solve many other predictive analytics challenges.