Mathematical Investor

Google data center in Ohio Artificial intelligence’s march of progress Without doubt, artificial intelligence (AI) and machine learning (ML) systems have scored numerous remarkable successes over the past few years: Defeating the reigning world chess cham…

Life expectancy, 1770-2023; source: Our World in Data Target date funds “Target-date funds” are currently the rage in the finance world.

Morningstar’s 2024 year-end report In February 2025, Morningstar released its latest scorecard report of mutual funds, measuring active funds versus index benchmarks as of 31 December 2024.

History of measurements of the speed of light; from Henrion and Fischloff, “Assessing uncertainty in physical constants,” American Journal of Physics, September 1986 Reproducibility in modern science Reproducibility has emerged as a major issue in numerous

S&P500 (black) and QQQ i.e.

Updated 26 July 2025 (c) 2025 Space aliens made this rock Extraterrestrial aliens made this rock While out hiking, I found this rock.

Nasdaq-100 (QQQ) (blue) and S&P500 (orange), Jan-June 2023; courtesy BigCharts Mid-March 2023 For a moment, let us turn back the clock to mid-March 2023.

A random walk on the base-4 digits of pi (see http://gigapan.com/gigapans/106803) A Random Walk Down Wall Street Fifty years ago, Princeton economics professor Burton Malkiel published A Random Walk Down Wall Street.

Introduction Suppose, in a national TV newscast, instead of citing data, analysis and predictions from major government agencies, the weatherperson displayed a chart of recent temperatures, noting “trends,” “waves” and “breakout patterns.”

A new paper, Causal factor investing: Can factor investing become scientific?