Marketplace®

Daily business news and economic stories
Season 2Episode 9Sep 23, 2025

What is a financial bubble?

Why do some economic markets go … pop?

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What is a financial bubble?
Binglin Hu

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Today, we’re talking about bubbles. Not the kind you play with. The kind that happen in the economy! Bridget and Ryan take a trip down memory lane to answer Jocelin’s question about what caused the 2008 housing bubble. With help from Bridget’s unforgettable treehouse bubble tale, we’ll learn what can happen when prices rise too high, too fast and the bubble finally pops. Plus, why it’s so tricky to spot a bubble before it bursts.

four signs of a financial bubble
Binglin Hu

Tips for grownups listening to “Million Bazillion” with kids

Money Talks

After you listen to the episode, here are some questions and conversation starters you can use with your kid listener to see how much they learned about bubbles.

  1. Have you ever experienced FOMO (Fear of Missing Out) or wanted something just because everyone else had it?

  2. What are examples in history when too many people paid way too much money for something and caused a bubble?

  3. If you could build your own treehouse, what would it look like?

  4. Would you rather have a piggy bank that grows your money slowly, or a magic wallet that gives you a surprise amount of money once a year?

  5. *Bonus* Not-So-Random Question: What’s the most valuable thing you own and why?

Tip Jar

For listeners who want to keep learning more about the housing market and economic bubbles, here are some ideas:

  • Listen to this “Million Bazillion” episode to learn more about the difference between renting and buying a house.

  • Then, check out our episode about recessions and depressions.

  • Want to know more about interest rates? We got you covered with this “Million Bazillion” episode about credit cards.

  • Click here to read about some of the more bizarre bubbles through history.

Gimme 5!

Thanks for listening to this episode! Has your kiddo ever seen a $2 bill? Maybe they got one for their birthday? Found one or even spent it on something cool?

We’re collecting stories from our kid listeners about these rare bills. Record your Million Bazillionaire and send the audio using this online form and we just might include your kid in an upcoming episode! We can’t wait to hear what they have to say.

This episode is sponsored by Greenlight. Sign up for Greenlight today at greenlight.com/million.

The Team

Thanks to our sponsors

NGPF

The Ranzetta Family Charitable Fund and Next Gen Personal Finance, supports Marketplace’s work to make younger audiences smarter about the economy. Next Gen Personal Finance is a non-profit that believes all students benefit from having a financial education before they cross the stage at high school graduation.

Greenlight

Greenlight is a debit card and money app for kids and teens. Through the Greenlight app, parents can transfer money, automate allowance, manage chores, set flexible spend controls and invest for their kids’ futures (parents can invest on the platform too!) Kids and teens learn to earn, save, spend wisely, give and invest with parental approval. Our mission is to shine a light on the world of money for families and empower parents to raise financially-smart kids. We aim to create a world where every child grows up to be financially healthy and happy. Today, Greenlight serves 5 million+ parents and kids, helping them learn healthy financial habits, collectively save more than $350 million to-date and invest more than $20 million.

Sy Syms Foundation

The Sy Syms Foundation: Partnering with organizations and people working for a better and more just future since 1985.