Who answers for the algorithm is the founding question of this guide, fintech ethics explained as a set of working fault lines rather than a conference panel: fairness, consent, inclusion, and accountability, each with money riding on it. Fintech ethics explained: the four fault linesFairness asks whether the model’s decisions would survive daylight: same risk, same price, regardless of which proxy variables stand in for race, age, or zip code. Fintech ethics is consumer protection conducted at software speed, and the speed is what makes the old oversight tools strain. Consent, data, and the price of personalizationPersonalized finance runs on data the customer hands over, and the ethical line runs through how the handover happens. What ethical practice means for US businessesFor operators, ethics has become an operating expense with a return profile.