By Serkan Arslanalp for the IMF Dollar dominance—the outsized role of the US dollar in the world economy—has been brought into focus recently as the robustness of the US economy, tighter monetary policy and heightened geopolitical risk have contributed to a higher greenback valuation. At the same time, economic fragmentation and the potential reorganization of global economic and financial activity into separate, nonoverlapping blocs could encourage some countries to use and hold other international and reserve currencies. Recent data from the IMF’s Currency Composition of Official Foreign Exc…