Shares of a luxury hotel led by Samsung Electronics Vice Chairman Lee Jae-yong’s younger sister were on the rise amid rumors that she might fill the group’s leadership vacuum. Shares in Hotel Shilla, led by Lee Boo-jin, the eldest daughter of Samsung Group Chairman Lee Kun-hee, soared Friday as market watchers speculated the 46-year-old female tycoon may succeed her brother in managing South Korea’s most powerful conglomerate.