WELLINGTON—New Zealand will get its youngest prime minister in more than 150 years after the small, nationalist New Zealand First Party agreed to form a new government with Labour Party leader Jacinda Ardern, ending the National Party’s decade in power.
The outcome caps a remarkable rise for Ardern, 37, who only took over the party’s top job in August, and marks another victory for a youthful global leader promising change, with big implications for the world’s 11th most traded currency, the central bank, immigration and foreign investment.
