Hello and welcome to the Intelligence on Economist Radio. I'm your host, Jason Palmer.

Every weekday we provide a fresh perspective on the events shaping your world.

Where do people get their stock tips? Well, it depends on how old they are. We take a

look at the habits and trends among millennial investors, how they're changing the day trading

game and what kinds of companies will be getting their attention.

And, seventh time lucky. Tomorrow, a new airport in Berlin will launch after six planned

grand openings. It's nine years behind schedule. Our correspondent goes along to a dress rehearsal

of sorts and explains that the airport's headaches aren't over yet.

But first, the world's oceans are under increasing pressure from fishing. Just a fifth of the

world's commercial species are sustainably caught. But the legal, known end of the industry

might literally be only the half of it. 20 to 50 percent of the global catch is illegal

or isn't reported or is woefully unregulated. That comes at an enormous cost and not just

to dwindling species. It robs poor coastal states of billions in revenue and much of it

wreaks havoc on underwater ecosystems. And the crews of all those ships are subject to

dangerous conditions, abuse and worse. Much of the illegal trade is just coming to light

thanks to new ways of spotting it. In particular, revelations about the vast number of what are

called dark fleets. Well, for a number of years, hundreds of rickety wooden fishing boats from

North Korea have washed up on Japanese shores. And it's been a mystery because the big question

is why these unseeworthy vessels have put so far out to sea in the sea of Japan, which is notorious

for its storms. Dominic Ziegler writes Banyan, the economist to column on Asian affairs.

Well, only this year has the mystery been solved. It turns out that nearly a thousand large industrial

sized Chinese fishing vessels have been heading every year into North Korean waters to suck up

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