Why do stock markets crash, and what causes recessions?

Stock markets crash and cause recessions when people suddenly stop trusting that things will stay good, leading to a chain reaction of selling and spending less.

Imagine you have a big pile of shiny red marbles that everyone agrees are worth $1 each because they look nice. One day, your friend Bob says his marble has a tiny crack and is only worth 90 cents. Suddenly, everyone looks at their own marbles with suspicion. "If Bob's is cracked, maybe mine is too!" They start selling for less than the others buy them for. Soon, no one wants to hold marbles because they are afraid the price will drop even more.

This fear spreads like a whisper in a playground. When people sell their marbles (stocks) quickly to get cash back, the price of every marble drops. This is called a stock market crash. It feels scary because your pile looks smaller now. But here is the good news: the marbles didn't break! They are still shiny red plastic. The problem was just that everyone got scared and tried to sell at the same time.

A recession happens when this fear moves from marbles to real life. If you think your job might go away because your parents stopped buying new toys, you stop letting you buy candy or video games every week. Shops have too many toys sitting on shelves and make less money. Then, they hire fewer people or pay them less.

Think of it like a trust circle. As long as everyone believes the next person will buy what they sell, money keeps moving like water in a stream. But if the trust breaks, the water stops flowing smoothly. The economy slows down because we are all holding onto our cash tight, waiting to see if the world is safe to spend again.