Basically, Erdogan, the leader of turkey, recently got a lot of new powers that allow him to do pretty much anything he wants. He purged all the public sector + army from the secular/left-wing/pro-kurd opposition, and recently named his son in law (I think) as finance minister. He stands for an Islamist Turkey in short, and it comes back to bite him in the ass. Investors are pulling out, and so here we are, perhaps witnessing the fall of the first domino that will provoke a crash when you also take in account global growth has been slowing down, and the US trade war that just begun.