Okay kiddo, a private equity fund is like a special kind of savings account for rich grown-ups who want to invest a lot of money.
You know how sometimes Mommy and Daddy save money in a piggy bank or a regular bank account? Well, grown-ups with lots of money can save their money in a private equity fund instead.
The people who run the fund are called "private equity investors." They use this money to invest in other companies - this means they give money to a company in exchange for ownership in that company.
The idea is that the company they invest in will be successful and make more money in the future. When the company becomes more valuable, the private equity investors can sell their ownership and make a profit.
It's kind of like when you trade your toys with your friends - if you give them a toy that's not as valuable as the toy you get in return, you make a profit!
But private equity funds can also be risky because sometimes the companies they invest in don't do well and they lose money. So, it's important for the private equity investors to do their research and pick good companies to invest in.