1. Selling a currency lowers its price; the currency bought rises.
2. Buying a currency raises its price; the currency sold falls.
3. When CBN sells $ to BDCs and buys Naira, Naira appreciates, and the dollar falls.
4. When China sells $ and buys Yuan, Yuan rises, and the dollar falls.
5. If Yuan rises, Chinese exports cost more, reducing exports.
6. China buys $ bonds to weaken Yuan, boosting exports.