Explainer: 6 things to know about Naira redesign and why Nigeria is clamping down on its vast cash economy

Nigerians have until the end of January to exchange their highest-value banknotes for freshly-issued bills. The aim is to bring an estimated 2.7 trillion naira ($6 billion) that circulates in informal channels into the regular banking system. But according to a report by Bloomberg, cash is the li