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A key currency view of global imbalances

Robert McCauley () and Hiro Ito

No 762, BIS Working Papers from Bank for International Settlements

Abstract: This study divides the world into currency zones according to the co-movement of each currency with the key currencies. The dollar zone groups economies that produce well over half of global GDP. The euro zone now includes almost all of Europe and some commodity producers, but remains less than half the size of the dollar zone. The dollar zone share has shown striking stability despite big shifts across zones over time. These include the demise of the sterling zone and the expansion of the DM/euro from northwestern Europe to Europe and beyond. Global imbalances differ from a currency perspective. In the 2000s, the dollar zone's current account disappeared by the onset of the Global Financial Crisis (GFC), even as the US current account plumbed all-time lows. The dollar zone's net international investment position also reached balance then. Thus, neither flow nor stock readings on the dollar zone supported widespread predictions in the early 2000s of an imminent dollar crash. In fact, most of the long-term widening of current accounts occurred within currency zones, where by construction currency risk is limited. Our account of the dollar's dominance rests not on the US economy's size but rather on the size of the dollar zone. In such a world, the rise of another large economy poses the question not of relative size but rather of re-alignment of third currencies. What if the renminbi becomes a key currency alongside the dollar and the euro? Already some emerging market currencies are co-moving with the renminbi against the dollar. On current evidence, a renminbi zone would shrink the dollar zone, and widen its current account deficit.

Keywords: global imbalances; current accounts; currency zones; international investment positions (search for similar items in EconPapers)
JEL-codes: F31 F32 F33 F41 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-mon and nep-opm
Date: 2018-12
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