Mumbai (PTI): The benchmark Sensex shot up by 276.21 points to 15,271.04 at 1030 hours at the Bombay Stock market here on Monday on persistent buying by operators on the back of firm trend in Asian markets.

The Bombay Stock Exchange 30-share barometer moved erratically in a range of 15,338.23 and 15,071.63 before being quoted at 15,271.04 at 10.30 am, up by 276.21 points.

The 50-issue Nifty of the National Stock Exchange also firmed up by 56.90 points to 4,630.85 at 10.30 am from previous close of 4,573.95.

Most of the Asian indices resumed better today, Taiwan up by 4.05 per cent, Nikkei up by 0.37 per cent, Straits times up by 2.34 per cent and Seoul composite index by 0.44 per cent.

Volatility increased on the bourses ahead of the expiry of March 2008 derivative contracts on Thursday, 27 March, a broker said.