Hello there! Have you ever traded snacks with your friends? Like, you give them your cookies and they give you their candies? Well, that's kind of what an equity swap is - but instead of snacks, you swap shares of companies with someone else.
Let's say you have shares in a company called Pokémon Inc. and your friend has shares in a company called Mario Corp. You both think the other company is going to do really well, but you're worried about taking a big risk. So, you both agree to swap shares - you give your friend some of your Pokémon Inc. shares, and they give you some of their Mario Corp. shares.
Now, here's where it gets a bit more complicated. You and your friend agree to do this swap for a certain amount of time, let's say a year. During that year, you'll own the Mario Corp. shares, but you'll also be responsible for anything that happens with those shares - if the price goes up, you'll make money, but if the price goes down, you'll lose money. The same goes for your friend who owns the Pokémon Inc. shares.
At the end of the year, you'll swap back - you give your friend back their Pokémon Inc. shares, and they give you back your Mario Corp. shares. Depending on what happened with the share prices during that year, one of you might make money and the other might lose money.
So, in summary, an equity swap is when you exchange shares of one company for shares of another company with someone else, for a certain amount of time. You'll be responsible for what happens with those shares during that time, and at the end of the swap, you'll exchange back to your original shares.