ELI5: Explain Like I'm 5

Bid–ask spread

Okay kiddo, imagine you have a toy car that you want to sell to your friend. You tell your friend that you will sell the toy car for $5. But your friend thinks that the toy car is only worth $3. So, he offers to buy the toy car from you for $3.50. This is called a bid.

Now, you want to sell the toy car, but you also want to make sure that you get a good price for it. So, you tell your friend that you will sell the toy car for $4.50. This is called an ask.

The difference between the bid and ask prices is called the spread. In our toy car example, the spread is $1 ($4.50 - $3.50).

The same thing happens in the stock market. When people want to buy or sell a stock, they make bids and asks. The difference between the highest price that someone is willing to pay for a stock (the bid) and the lowest price that someone is willing to sell it for (the ask) is the bid-ask spread.

So, if the bid for a stock is $10 and the ask is $11, the bid-ask spread is $1. The bid-ask spread can vary depending on how many people are buying and selling the stock and how much they are willing to pay or sell it for.