Singapore stocks slid to a 27-month low yesterday after a computer bug disrupted trading for most of the morning. The Singapore stock exchange said it would launch an enquiry into the incident. Technical glitches may be common on the Philippine stock exchange and occasionally in Hong Kong, but they are rare in Singapore, which bills itself as the region's premier hi-tech city. Dealing resumed at 1.15pm yesterday, with the exchange extending business an extra hour to 6pm. Stock exchange spokesman Peter Chia said it was the first time a technical fault had halted trade since the existing computer system was installed in 1989, apart from a couple of faults during the introductory period. 'It is believed there was a bug in the system,' he said. When the system went down, the benchmark Straits Times Industrial Index was down 0.64 point at 2,018.96 points, on a turnover of just 3.4 million shares. When it reopened, the index slid to end at 1,996.79, closing below 2,000 points for the first time since January 1995, with dealers anxiously making up for the lost time after watching markets around the region fall. Kuala Lumpur's benchmark Composite Index, which is closely linked to the Singapore market through a number of cross-listings, closed 1.34 per cent lower at 1,074.86 points, an eight-month low. Weakness in Singapore Telecommunications and rumours that the Singapore Government may take further measures to curb the property market also hurt the index.