Adding a road can make traffic worse. It sounds impossible, but it is known as the Braess Paradox. When a new route is introduced, individual drivers naturally choose what appears to be the fastest path. Millions of individually sensible decisions can then produce a slower outcome for everyone. Remove the road, and total travel time can actually fall. The strange part is that nobody needs to make a mistake. Each person is simply optimising their own route. The problem emerges from interaction. That idea matters in markets for a different reason. A strategy doesn’t operate in isolation. Once enough participants respond to the same opportunity, their responses can change the opportunity itself. An edge can therefore have a lifespan determined partly by how many people discover it. The interesting question isn’t always “Does this strategy work?” Sometimes it’s “What happens to the environment if everyone starts doing it?” #GameTheory# #Trading# #MarketStructure#