[Feature] Add function Sharpe ratio

[Abhinavcode13]

Are you adding a new feature?

• [x] YES
• [ ] NO

Are you enhancing the old feature?

• [ ] YES

• [x] NO

  Is your feature request related to a problem?

• [ ] YES
• [x] NO

Describe your feature/enhancement.

This function calculates the Sharpe Ratio, which measures the risk-adjusted return of an investment.

It takes three arguments: returns represents the historical returns of an investment, risk_free_rate is the risk-free rate of return, and volatility is the standard deviation of the investment's returns.

Can you add the feature by yourself?

• [x] YES
• [ ] NO

Additional Information

[Abhinavcode13]

Please assign this to me @ighoshsubho

[ighoshsubho]

Sure go ahead @Abhinavcode13 ;)

[ighoshsubho]

Hello @Abhinavcode13, this is Version 2 of Fintech API repository, there had been few major updates, please go through the CONTRIBUTING.md to make further contributions. Thanks.