risk-management

Margin trading and leverage explained: how broker loans work, margin calls, the 1929–2021 history of blowups, and when leverage makes economic sense.

Derivatives get blamed for financial crises and praised for managing risk. The truth is they do both — often simultaneously.

Banks use machine learning to rank borrowers and challenge models, yet capital and stress-test models still lean on regression. Here is what regulators allow, fear, and have actually documented.

Insurance is risk-pooling. Done right, it's essential financial protection. Done wrong, it's an expensive hedge against things you can afford. Here's how to think about insurance clearly.