Japan's Nikkei stock index jumps 4.3% after ruling party chooses an ultra

+4 National News Japan's Nikkei stock index jumps 4.3% after ruling party chooses an ultra-conservative as its leader By ELAINE KURTENBACH - AP Business Writer 16 mins ago Japan’s Nikkei stock index has jumped more than 4% after its ruling party chose an ultra-conservative as its leader and likely first woman pri…