design a LLD of portfolio management system where you can add any stock to your portfolio sell any stock. calculate % return on your port folio. list your portfolio which is stocks with current prices and returns on them.

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Design a portfolio management system to add and sell stocks, calculate returns, and display current prices and returns.

Create a class for the portfolio with methods to add and sell stocks
Implement a method to calculate the percentage return on the portfolio
Maintain a list of stocks in the portfolio with their current prices and returns
Use arrays or lists to store the portfolio data
Ensure proper error handling for invalid inputs or insufficient data

design a LLD of portfolio management system where you can add any stock to your portfolio sell any stock. calculate % return on your port folio. list your portfolio which is stocks with current prices and returns on them.

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