The mathematisation of finance - excessive use of mathematical models in finance - has been blamed for the recent financial and economic crisis. We argue that the problem might actually be the financialisation of mathematics, as evidenced by the gradual embedding of branches of mathematics into...

Changepoint detection methods originated in Shewhart’s seminal work on quality control in industrial production (Shewhart, 1931, 1939). Wald then pioneered sequential statistical analysis to test hypotheses successively as new data become available (Wald, 1945; Wolfowitz and Wald, 1948). Over the...

We investigate changepoints in the cross-section of stock returns using an ensemble of dedicated unsupervised learning methods. Our large-scale study reveals a sustained incidence of changepoints in the mean, variance, and distribution. This finding is robust to the choice of the changepoint...