5 personal finance rules | Achilleas Mantes | TEDxDeree ACG

Personal finance decisions are often made from memory and emotion rather than a clear process, and this talk argues for a rule-based approach similar to the checklists used in aviation. It presents five principles: automating savings early to benefit from compound interest, holding a broad market through low-cost ETFs, favouring productive assets over speculative tokens, keeping costs and taxes low by avoiding frequent trading, and relying on academic research rather than social media advice. The speaker, Achilleas Mantes, is a macroeconomist who works on environmental, development and monetary economics. The talk concludes that long-term financial success mainly requires clear goals, automated low-cost investing and consistently following a personal financial checklist.

• Automate savings first to make use of compound interest
• Use low-cost ETFs for broad, global market diversification
• Avoid frequent trading and high-fee products to limit costs and tax drag
• Rely on academic research rather than social media advice

Achilleas argues that personal finance should be managed with the same disciplined, rule-based approach used in high-stakes fields like aviation, where checklists prevent fatal errors caused by human memory and emotion. While society provides detailed step-by-step guidance for education and careers, it leaves individuals to improvise with their money, leading to risky speculation and emotional choices. To solve this, the talk outlines five core principles rooted in decades of financial science: automate savings first to maximize compound interest, own the entire global market through low-cost ETFs for broad diversification, focus on productive assets like equities rather than non-yielding speculative tokens, minimize costs and tax drag by avoiding frequent trading and high-fee products, and trust academic research over social media advice. Ultimately, long-term financial success does not require complex strategies, but rather defining clear goals, automating low-cost investments, and strictly following your personal financial checklist. Achilleas Mantes is a macroeconomist specializing in environmental, development, and monetary economics. He works as a Senior Consultant in the Macroeconomic Modeling Department of the French Development Agency, where he studies the economic impacts of climate change and the green transition in developing countries. He has conducted studies on the Greek economy for the Institute of Labor, and collaborates with Greekonomics, contributing to research and fact-checking. He is also a research associate at the University of London and has taught at universities in England and France. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx