October opened with the Nifty 50 falling, not stopping. The index fell 0.88% to 22,421.95 on 1 October 2026, a fresh six-month low, as Brent crude jumped 4.4% to $102.31 on a report that a third US aircraft carrier is heading toward the Middle East, extending what several market reports now call an eighth straight losing week, the longest such run in 25 years. Six scheduled events, plus one unscheduled one in Washington, will do most of the deciding for the rest of the month.
1. Does the losing streak reach a 25-year record?
The Nifty has not fallen for nine straight weeks since 2001, when the dot-com bust, the Ketan Parekh scam and the September 11 attacks combined to produce the longest weekly losing run in 25 years. The week ending 1 October extended the current run to an eighth straight losing week by several market accounts, touching a fresh six-month low, and whether the week of 5 to 9 October adds a ninth is now the question, with streaks this long historically ending either with a sharp reversal or a long flat stretch rather than a gentle recovery. The index is also testing its 200-week moving average, a level our Indian stock market today wrap is tracking daily.
2. A new oil shock lands days before the RBI's 7 October decision
A hold at 5.25% is still the base case, with August CPI at 4.82% and food inflation at 5.95% both above the RBI's comfort zone, as our will the RBI cut rates again in 2026 analysis sets out. What changed on 1 October is that Brent, which had eased from $108.75 to about $97 by late September, jumped back to $102.31 on reports of a third US aircraft carrier heading toward the Middle East and China halting fuel exports, removing the small relief the RBI had been counting on, covered in our third US carrier and oil spike piece and tracked daily on our crude oil price today page.
3. Q2 FY27 earnings season opens, 8 October
This is the first quarter to carry a full three months of elevated crude oil and a weaker rupee in the cost line, which makes it a cleaner read on margin pressure than Q1 FY27 was. TCS also has its board considering a second interim dividend on the same day it reports, and a repeat of the earnings beat that rescued the market back in July would be the single most powerful thing that could happen to the Nifty this month, as our Nifty's 2026 round trip piece explains.
4. The Russia sanctions tariff clock, closing around 18 October
The Sanctioning Russia and Iran Act, signed on 18 September 2026, gave the US President a 30-day window to raise tariffs of up to 100% on the largest buyers of Russian energy, and that window closes around 18 October. India bought roughly 2.08 million barrels a day of Russian crude in August, about 45% of its imports, which keeps it inside the law's scope, as our Russia sanctions and India piece covers. As of 2 October, no tariff decision had been announced, which makes this the quietest major risk on the calendar.
5. India's September CPI, due around 12 October
August's print of 4.82% was a seven-month high, with food inflation at 5.95%, and September's number, due around 12 October, lands five days after the RBI decision and will shape expectations for the next meeting regardless of what happens on 7 October. A cooler print would be the first real evidence the RBI's patience is paying off, though a fresh oil spike in early October works the other way.
6. The Federal Reserve's 27 to 28 October meeting, now with a data blackout
The US government shut down on 1 October 2026 after a stopgap bill failed to clear in time, furloughing most Bureau of Labor Statistics staff and delaying the release of the September jobs report and inflation data the Fed would normally use to decide on 27 and 28 October, a story our US government shutdown piece covers in full. Combined with the Fed's 16 September hike to 3.75 to 4.00%, which is the reason US yields and the dollar have stayed strong through India's worst month in 25 years, the shutdown adds a new layer of uncertainty about what the Fed will see, or say, at its next meeting, covered in our FPI outflows tracker.
What could go wrong
The opposite case is just as real. A TCS beat, a confirmed de-escalation near Iran that pulls oil back down, and a tariff deadline that passes with no action would be three pieces of good news inside two weeks, and a market that has spent eight weeks pricing bad news tends to move fast when it stops arriving.
Most months have one thing worth watching. October 2026 opened with a market extending a 25-year losing streak, a fresh oil shock from a US carrier build-up near Iran, a quarter of earnings that will settle whether September was noise or signal, a tariff deadline nobody is talking about, and a US government shutdown clouding the Fed's own data. Whichever way it breaks, it will not be quiet. One step past October, the Diwali session on 8 November is covered in Muhurat trading 2026.