Christoph MarkBuild your own AI: how to teach GPT to search the web and execute codeLearn about the 50 lines of Python code that create your own AI agent that searches the web, reads documents, and writes its own Python codeFeb 28, 2023Feb 28, 2023
Christoph MarkinInsiderFinance WireProbabilistic alpha and beta: quantifying an uncertain edgeIn finance, the performance of an asset is often quantified by alpha (the excess returns above a benchmark return) and beta (the…Dec 20, 20221Dec 20, 20221
Christoph MarkinInsiderFinance WireSkewness: the fallacy of the expected returnLearn how the expected value can mislead you due to skewness in probability distributions.Nov 7, 20222Nov 7, 20222
Christoph MarkinTowards Data ScienceTalking to machines: prompt engineering & injectionLearn how to talk to large language models effectively-and about the risks of misguiding deployed model applicationsOct 3, 2022Oct 3, 2022
Christoph MarkinInsiderFinance WireProbabilistic programming in finance: a robust Sharpe ratio estimateIn this post, we will develop a time-varying, probabilistic extension of the Sharpe ratio as a widely used performance metric for…Aug 23, 2022Aug 23, 2022
Christoph MarkinInsiderFinance WireHow heavy tails destabilize Markowitz portfolio selectionIn this post, we turn to Markowitz’s Modern Portfolio Theory and show how the heavy tails of financial return distributions drastically…Aug 3, 20221Aug 3, 20221
Christoph MarkinInsiderFinance WireWhy GARCH models fail out-of-sampleWe investigate the consequences of infinite moments by showing how the popular GARCH risk model almost perfectly…Jul 29, 2022Jul 29, 2022
Christoph MarkinInsiderFinance WireInfinite kurtosis: moment statistics under fat tailsThis is the second post of a short series of posts on extreme events in financial time series. In the previous post, we have introduced…Jul 20, 2022Jul 20, 2022
Christoph MarkinInsiderFinance WireThe 23-sigma fallacyHow extreme events in financial time series can be quantified & extrapolated using power-law theory.Jul 15, 20221Jul 15, 20221
