Copper prices and the kwacha: Bank of Zambia's exchange-rate transmission

Copper supplies roughly 70% of Zambia's export earnings, which means swings in the world copper price pass through almost mechanically into the kwacha's exchange rate and, from there, into domestic inflation. Bank of Zambia's own monetary policy statements describe this channel repeatedly: in its statement covering the first half of 2017, the Bank attributed the kwacha's relative stability that year directly to improved copper prices, alongside stronger non-resident appetite for government securities and exporter dollar conversions. The reverse played out violently in 2015, when a slump in copper prices combined with a sovereign credit-rating downgrade and weaker Chinese demand to push the kwacha down by roughly 19% in just three months and eventually to its worst single-day fall since 2001; the Bank intervened by selling foreign exchange to slow the slide in the final quarter of that year alone. Because mining accounts for such a large share of foreign-currency supply, Bank of Zambia's policy statements since have consistently framed exchange-rate and inflation forecasts around the copper-price outlook and mining-sector dollar inflows rather than around domestic demand conditions alone, a structural dependency distinct from the debt dynamics behind Zambia's separate 2020 sovereign default.