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WBUR Podcasts, Boston. Yeah, I've made quite a lot of trades at 500 a week.

23-year-old Max de Groot is indeed a trader.

He also happens to be an aspiring doctor.

He's a med student in the Netherlands.

But for about 25 hours every week, more than half the working week, if he had a job,

he makes trades, 500 trades a week like you heard, and not on

any conventional stock market. Max trades on something called prediction markets.

I joined around the time of the election, and one thing I found very entertaining was

Trump mentioned markets. So basically the idea is that you bet on what Trump will say,

which is quite stupid, but it's actually quite active. And at first, of course, I made some,

well, some losses, but then after a while I got a bit better. You kind of start knowing what the kind of things he talks about and such.

It's a very weird thing to predict on, but on the polar market, it's possible.

Weird for sure.

But growing rapidly.

Prediction markets let people place bets on future events.

From how many touchdowns your favorite wide receiver will catch,

to how many albums Taylor Swift's latest release will sell

to where the biggest betting market of all,

...