Mumbai: The SENSEX opened on a promising note but later turned weak during morning trading, even as hectic activity was seen in shares of Maruti Udyog Ltd (MUL) on the first day of its listing on the Bombay Stock Exchange (BSE) on July 9 on fairly heavy buying support.

The BSE sensitive index opened firm at 3,635.86 as against July 8 close of 3,629.68 and later moved downwards to a low of 3,617.13 before being quoted at 3,622.88 at 10.30 am (IST).

Brokers said Foreign Institutional Investors (FIIs) and private mutual funds seemed to have shifted their focus on MUL that opened with premium at Rs 158.40 and later showed small variations in a range between Rs 164.90 and Rs 156.10 at early stages on the first day of its listing on the BSE.

IT counters continued to attract buying support on expectations of encouraging first quarter results by IT major Infosys Tech on July 10.

Infosys Tech, HCL Tech, Mphasis BFL, Satyam Computers and other second-line stocks were quoted moderately higher on buying interest by investors.

Meanwhile, the NASDAQ composite index surged up further by 25.79 points at close on Wall Street on July 8.

PTI