“If you speak in a low voice, no one hears you.” Two narrow alleys in Istanbul. A crowd of men, yelling. Screaming, shouting, chaotic gesticulation, grimacing faces, a deafening buzz of wild voices. The verbal noise dominates the scene. A communicative situation, incomprehensible at first to the alien bystander who doesn’t speak the language. Apparently they are traders, I find out. And they call it “the walking stock market”. But what does it really mean? “Today it’s a very quiet day. Everything is still at rest."