Economic concern and U.S.-China trade dispute ripple through markets.

Currencies around the world are tumbling to multiyear lows, bruising investors’ portfolios and fanning the flames of a global trade war. The Chinese yuan recently hit its lowest level in more than a decade against the dollar, the euro dropped to a fresh two-year low last week and the British pound is at depths it hasn’t consistently plumbed since the 1980s. Some emerging-market currencies such as the Colombian peso have fallen to their lowest prices on record against the dollar, while Argentina has recently introduced capital controls after its peso plunged in August. Out of 41 currencies tracked by The Wall Street Journal, only nine are up against the dollar in 2019.

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