Mumbai, Nov 5 (IANS): Anxiety over Bihar polls outcome coupled with upcoming US jobs data dented investors' sentiments in the Indian equity markets and plunged a barometer index by 76 points during the post-afternoon session on Thursday.

Both the bellwether indices of the Indian equity markets opened in the negative territory in sync with European and Asian markets.

Furthermore, lackluster quarterly results and absence of any major positive trigger eroded investors' confidence.

On Thursday, the wider 50-scrip Nifty of the National Stock Exchange (NSE) was trading flat. It was lower by 29.90 points or 0.37 percent at 8,010.30 points.

The barometer 30-scrip sensitive index (Sensex) of the S&P Bombay Stock Exchange (BSE) opened at 26,557.80 points, was trading at 26,476.56 points (1.30 p.m.) -- down 76.36 points or 0.29 percent from the previous day's close at 26,552.92 points.

The Sensex touched a high of 26,557.80 points and a low of 26,373.48 points in the intra-day trade so far.

Market observers cited that anxiety over Bihar election outcome coupled with upcoming US jobs data and disappointing quarterly results subdued the intra-day trade.

"The weakness emanated from the sell-off in the European markets due to the Volkswagen issue. Domestically, investors were reluctant to chase prices ahead of the crucial jobs data in the US and Bihar election results," Anand James, co-head, technical research desk with Geojit BNP Paribas Financial Services, told IANS.

The US jobs data, to be released on Friday, is expected to give cues on whether the US Fed will raise interest rates in its December meeting.

The US Fed is slated to conduct its Federal Open Market Committee (FOMC) during December.

The FOMC assumes significance as higher interest rates in the US are expected to lead away FPIs (Foreign Portfolio Investors) from emerging markets such as India.

Investors were also seen to avoid taking long position ahead of the Bihar election verdict which is due on November 8.