• An investment instrument that pools money from many investors and uses that money to invest in a diversified portfolio of stocks, bonds, or other securities. 
• It is managed by a professional investment company.
• It offers diversification, professional management, and liquidity.

A mutual fund is a pool of funds collected from individuals/ companies/ other entities to invest in financial securities like equity and bond, gold/silver, and commodities. Each mutual fund is managed by one or more fund manager. 

This post will describe the methodology used for different calculations on this website.