Korea's won rallied against the U.S. dollar on Friday, as leaders of North and South Korea signed a declaration to work toward a "complete denuclearization" of the Korean peninsula. The agreement, called the Panmunjon declaration, was signed as part of the first inter-Korean summit in 11 years. The won strengthened both against the U.S. dollar its main rival, and the Japanese yen which is a haven asset that is known to rise in times of market or geopolitical trouble. One dollar last bought 1,068.20, down 0.9%, according to FactSet. The won fetched ¥0.1023, up 0.9%.