Shares of Yuyu, Yungjin rallied

Shares of two pharmaceutical companies – Yuyu and Yungjin - reached a record high during trading on May 27, driven by bright prospects of new drug development and pharmaceutical bulk export.

Yuyu shares ended up 15 percent, or 1,750 won, at 13,550 won. Yungjin shares hit as high as 1,535 won during the day.

Yuyu acquired its U.S. patent for furancarbonylguanidine derivatives for the trea...