Limiting Drawdowns Rather Than Maximizing Returns

Prominent asset manager Mary Meeker once said her primary goal is limiting drawdowns! While most portfolio construction is explicitly or implicitly focused on returns, she knew that minimizing events that can decimate the portfolio is more important for long term gains than trying to maximize growth periods. Famously, a portfolio needs to double to make… Read More »

Machine Learning in Finance and Investing

The first time I heard the term ‘Artificial Intelligence’ was in the 1980s, when my dad worked for Digital Equipment Corporation, in the Silicon Valley of the East (Massachusetts). And yes they made computer chips from Silicon. In the 80’s Artificial Intelligence referred to, basically, complex logical structures, with each decision leading to a tree… Read More »

A Better Portfolio Optimization Method

You may have heard of Markowitz’s Critical Line Algorithm, or CLA. CLA was Markowitz’s attempt to solve the problem of portfolio optimization using quadratic math. For a couple reasons is was an ingenious invention. But it also has its problems. The problem with CLA is that it demonstrates large changes in the portfolio with small… Read More »