Sensex and Nifty October 21, 2026: IT Rally Fades as Midcaps and Smallcaps Slide

Sensex and Nifty on October 21, 2026 handed back an 800-point morning rally and closed in the red for a second straight session. The BSE Sensex settled at 73,709.69, down 143.21 points or 0.19%, according to the BSE’s own index page. The Nifty 50 lost 77.60 points, or 0.34%, to end at 22,811.35. The headline numbers look mild. Underneath, it was a rough day for anyone holding mid and small caps.

How the Sensex and Nifty October 21 session played out

The open was strong. India Today reported that the Sensex touched an intraday high of 74,682.19, more than 800 points above Monday’s close, as Jio Platforms opened its IPO and IT names rallied. That didn’t last. Elevated crude prices and profit-booking across sectors wiped out the gains by the afternoon. The benchmarks did claw back some ground from their intraday lows before the close, CNBC-TV18 said, but not enough to finish green.

Breadth tells the real story. CNBC-TV18 noted that declining shares outnumbered advancing ones by about six to one. The Nifty Midcap 100 fell 1.58% and the Nifty Smallcap 100 dropped 2.37%, per India Today, far worse than the benchmarks. The Nifty Bank index shed 511 points to 54,977.

IT was the only bright spot

The Nifty IT index rose 2.88% and, according to CNBC-TV18, was the only sectoral index to close higher. HCLTech gained 3.40%, Infosys 3.31%, Tech Mahindra 3.21% and TCS 2.68%. Those four were among the Nifty’s five biggest gainers, which is why the benchmark held up far better than the broader market. A handful of heavyweights carried the index while the rest of the market sold off.

Where the selling hit hardest

Bajaj Finance was the top Nifty loser, down 3.33%, with CNBC-TV18 pointing to worries about its margin outlook. Auto stocks mostly fell 2-3% after October vehicle registration data, and the Nifty Auto index ended 1.54% lower. Metals lost 1.71% and realty 1.25%.

Results drove several sharp single-stock moves. SRF fell about 5% after weaker-than-expected numbers across most segments (we broke down SRF’s Q2 results here). Vishal Mega Mart slipped nearly 5% on lower same-store sales growth, covered in our Vishal Mega Mart Q2 post. ABB India dropped 6% after its parent ABB Group reported, and Manappuram Finance lost 6% as gold financiers came under pressure. Eternal ended lower too, though it recovered from its intraday lows after its Q2 results.

Crude, volatility and institutional flows

Oil stayed the main worry. India Today put Brent crude at $110.74 a barrel, a level that pressures the rupee, input costs and the inflation outlook for an import-dependent economy. India VIX, the market’s fear gauge, rose 6.29% to 15.70.

Institutional data was more reassuring. Provisional figures cited by CNBC-TV18 show FIIs were net buyers of ₹1,022.32 crore on Wednesday and DIIs bought a net ₹1,614.32 crore. That’s a turnaround for foreign investors, who were net sellers of ₹1,148.64 crore on Monday, October 19.

What it means

A 0.19% dip on the Sensex hides a day where most stocks fell hard. With FIIs back as buyers for a session but crude above $110, we’d treat the IT bounce as earnings-driven rather than a sign the broader market has turned. For context on the previous session, see our Sensex and Nifty report for October 19.

Disclaimer: This article is for information and education only and is not investment advice. Please do your own research or speak to a SEBI-registered adviser before making investment decisions.