Mumbai, Oct 22 (IANS): Key domestic equity indices provisionally closed on a negative note on Monday, as heavy selling pressure in energy sector stocks weighed on investors' sentiments.

The Indian stock market indices -- S&P BSE Sensex and NSE Nifty50 -- ceded their early gains during the final hour of the day's trade.

Besides, the Indian rupee weakened to 73.46 against a greenback. It had opened at 73.41 to a US dollar.

In addition, a slight rise in global crude oil prices to around $80-per-barrel and other geo-political concerns subdued key indices.

Sector-wise, almost all indices resonated with the S&P BSE Sensex. Heavy selling pressure was witnessed in the energy counters which fell over two per cent.

Index-wise, the S&P BSE Sensex provisionally closed at 34,689.39 points down 181.25 points or 0.53 per cent.

It swung over 600 points, touching an intra-day high of 34,748.69 points and low of 34,082.76.

Similarly, the NSE Nifty50 of the National Stock Exchange (NSE) ended the day's trade at 10,245.25 points, down 58.30 points or 0.57 per cent.