India, Aug. 18 -- The stock market soared on Monday, driven by the promise of Prime Minister Narendra Modi to overhaul the Goods and Services Tax (GST) system, making a range of essentials and electronics cheaper and triggering a wave of buying across sectors.

The benchmark Nifty 50 jumped 1.51 per cent to 25,003.90, while the BSE Sensex climbed 1.34 per cent to 81,682.61, setting up both indices for their best sessions in months, according to figures mentioned in a Reuters report.

If gains hold, Nifty is on course for its best day in three months while the Sensex was on track for its best session in two months.

Broader indices also joined the rally, with mid-cap and small-cap stocks rising 1.5 per cent and 1.3 per cent, respectively....