Modern Portfolio Theory

Modern Portfolio Theory, or MPT, is a framework for constructing investment portfolios that maximize returns for a given level of risk. The theory assumes efficient markets and rational investors.

MPT emphasizes diversification, suggesting that a mix of assets with varying correlations can reduce overall portfolio risk while maintaining or improving returns.

The theory relies on the expected returns of assets, their individual risks, and the correlation between them.

Combining assets with low or negative correlations reduces risk since losses in one asset might be offset by gains in another.

Consider Sandra having a portfolio of fifty percent stocks and fifty percent bonds.

Stocks typically offer higher returns but with higher risk, while bonds are less volatile with lower returns.

When combined, Sandra's portfolio balances the risk and return.

Bonds may perform well during economic downturns, while stocks often excel during periods of market growth.

Risk-averse investors might choose portfolios closer to lower risk, lower return, while risk-tolerant investors might target higher-risk, higher-return portfolios.

By applying MPT principles, investors can achieve better returns, making it suitable for modern investment strategies.