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Indian markets ended one of their worst weeks in months on Friday, October 23, with the Sensex closing at 73,123.83 and the Nifty 50 at 22,600 — down in all four trading sessions of a truncated week, as an oil-price shock collided with a tenth straight week of foreign selling. The festive season, usually a tailwind for Indian equities, offered no cheer at all.
The numbers behind the rout
On Friday itself, the Sensex fell 125.56 points (0.17%) to 73,123.83 after plunging more than 1,000 points from its intraday high, while the Nifty dropped 87.65 points (0.39%) to 22,600, after touching an intra-week low of 22,372. For the week, the Nifty lost 2.4% and the Sensex shed 1,575 points, according to HDFC Sky's week wrap, which puts the market value wiped out at about ₹16.1 lakh crore (total BSE market capitalisation falling from ₹467.93 lakh crore to ₹451.83 lakh crore). The pain was far worse beyond the benchmarks: on Friday, the Nifty Midcap 100 fell 2.21% and the Smallcap 100 fell 2.94%, and for the week the smallcap index crashed more than 7%, its worst weekly performance in 20 months.
Why oil, why now — and who kept buying
The proximate cause is Brent crude, trading around $114–$117 a barrel and near a six-month high on escalating West Asia tensions, including the US-Iran standoff and Houthi attacks on Saudi Arabia. For India, the world's third-largest oil importer, that means imported inflation, squeezed corporate margins and pressure on the rupee — which closed Friday at 94.93 against the US dollar. The New Indian Express notes the same chain: elevated crude, geopolitical tension and continued foreign outflows driving broad-based selling.
Foreign institutional investors (FIIs) have now sold for 10 straight weeks, with month-to-date net selling of ₹51,466 crore as of October 24 — though the pace slowed this week. Domestic institutional investors (DIIs) bought ₹10,942 crore this week and ₹59,110 crore month-to-date, cushioning the fall but not preventing it. Earnings told the same oil story: Bharat Petroleum (BPCL) reported a 21% year-on-year fall in Q2 net profit to ₹4,863 crore, with EBITDA down 13.37%, as crude input costs compressed refining and marketing margins. Brokerage Bernstein cut its December 2026 Nifty target to 25,000 from 26,000, warning that a capital-gains tax cut alone would not bring foreign money back.
What to watch next week: the US Federal Reserve's policy decision, the Bank of Japan's rate announcement, US GDP data, Brent's direction and the rest of Q2 earnings. The backdrop is familiar from this week's Treasury-yield plunge and tariff politics ahead of the US midterms — global nerves, transmitted through oil, landing directly on Indian portfolios. Until crude retreats or earnings decisively surprise, the market's message is simple: watch the oil price before watching the ticker.