New Delhi, Sept. 4 -- The Indian stock market saw robust buying across sectors, driven by optimism surrounding a possible GST slab rationalisation.

The Sensex ended the session 410 points higher, or 0.51 per cent, at 80,567.71, while the Nifty 50 gained 135 points, or 0.55 per cent, to close at 24,715.05. The BSE Midcap index advanced 0.63 per cent, and the Smallcap index climbed 0.90 per cent.

On Wednesday late evening, the Centre and states on Wednesday approved the most significant reform of the Goods and Services Tax (GST) since its rollout eight years ago. The GST Council, the apex body for the tax, unanimously cleared major rate reductions on numerous essential items, making most goods and certain services more affordable.

Sumeet...