After gaining 133 points in opening trade today, the Sensex at the Bombay Stock Exchange firmed up further to stand 262 points, or 1.4 per cent in the green at 19,398, a short while ago. The markets rose on re-emergence of buying interest at lower levels. But other Asian markets in Japan, Singapore, South Korea, China, Indonesia, Hong Kong, and Taiwan were trading mixed, after a weekend rescue package for fiscally troubled Ireland failed to soothe investor concerns over European sovereign debt.