Sensex falls 548 points as crude tops $105; Dr Reddy's gains, Apollo slides

Indian shares gave up an early rally and closed lower on Monday, October 12, 2026, as crude oil prices climbed back above $105 a barrel. The BSE Sensex fell 547.65 points, or 0.76%, to 71,924.68, and the NSE Nifty 50 lost 157.10 points, or 0.7%, to end at 22,363.35. Both indices had opened higher, helped by a stronger rupee, before selling took hold through the session. The fall erased much of Friday's sharp rebound, when the Sensex had jumped 879 points. Smaller companies held up better than the benchmarks, with the Nifty Smallcap 100 index outperforming.

Monday's session showed how closely Indian equities are tracking the price of oil. India imports most of the crude it uses, so every sustained move above $100 a barrel raises costs for companies, puts pressure on the rupee and feeds into inflation. That last point is especially sensitive this week: official data released the same day put retail inflation for September at a 21-month high of 5.54%. Higher inflation reduces the room for interest rate cuts, which is also reflected in firmer government bond yields.

The pattern of the day matters too. A higher open followed by a steady slide suggests investors are using rallies to reduce exposure rather than to add to it, a sign of nervousness rather than panic. Continued selling by foreign portfolio investors adds to that pressure on large, heavily owned stocks, which make up most of the Sensex and Nifty.

The relative strength of smaller companies and of defensive names such as pharmaceutical stocks offers a partial counterweight. Dr Reddy's rise and Bajaj Auto's gains show buyers are still selective, picking companies with their own earnings or export stories. The decline in Apollo Hospitals and Tech Mahindra shows how quickly sentiment can turn on individual stocks while the broader mood is cautious. With the second-quarter results season under way, company earnings are likely to drive more of these stock-specific moves in the coming days.

Short-term: Oil prices, foreign investor flows and second-quarter earnings announcements will set the direction for the next few sessions; another spike in crude would likely keep pressure on the benchmarks.

Long-term: If oil stays above $100 for an extended period, it could weigh on corporate profit margins and on the rupee, and delay any easing in interest rates.

Who is affected: Retail investors and mutual fund holders with large-cap exposure, companies sensitive to fuel costs, and importers exposed to a weaker rupee.

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