# Explainer: Modern Portfolio Theory (MPT)

Modern Portfolio Theory (MPT) is the backbone of DeFAI Agent Franklin's portfolio optimization approach. 

Developed by economist Harry Markowitz in 1952, MPT revolutionized financial investing by introducing mathematical methods for risk-return optimization. 

This explainer will provide historical background, fundamental concepts, and its application in Franklin AI.

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[Historical Background](/explainer-modern-portfolio-theory-mpt/historical-background.md)
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[Key Concepts](/explainer-modern-portfolio-theory-mpt/key-concepts.md)
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[Application in Franklin AI](/explainer-modern-portfolio-theory-mpt/application-in-franklin-ai.md)
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[Why MPT Matters](/explainer-modern-portfolio-theory-mpt/why-mpt-matters.md)
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