The five sessions that rattled Dalal Street hardest
Nifty 50 and Sensex's steepest single-day percentage declines of 2026, ranked — each one tracing back to the same fault line: the West Asia conflict and its aftershocks on oil, the rupee and foreign flows.
Period: Jan – Jun 2026
Worst fall: 19 Mar, −3.26%
Common trigger: US–Israel–Iran war
Single-day % decline, Nifty 50 close-to-close
Ranked worst to least severe
Session-by-session breakdown
01
19 March 2026
Thursday
−3.26%Sensex & Nifty, in lockstep
Sensex
−2,497 pts −3.26%
Closed 74,207
Nifty 50
−776 pts −3.26%
Closed 23,002
Why: A gap-down open on surging crude and hawkish Fed commentary turned into a rout after HDFC Bank — the heaviest index weight — sank nearly 8% on chairman Atanu Chakraborty's abrupt resignation. All 30 Sensex stocks closed in the red; ~₹12 lakh crore in investor wealth erased in one session.
02
11 May 2026
Monday
−1.70%Sensex led the fall
Sensex
−1,313 pts −1.70%
Closed 76,015
Nifty 50
−360 pts −1.50%
Closed 23,816
Why: Crude crossed $105/bbl after Trump rejected Iran's counterproposal on a peace deal. Consumer durables, oil & gas and realty led sectoral losses; ~₹5.66 lakh crore of investor wealth wiped out intraday.
03
29 May 2026
Friday
−1.50%Nifty's sharper leg
Sensex
−1,092 pts −1.44%
Closed 74,775.74
Nifty 50
−359 pts −1.50%
Closed 23,547.75
Why: A stalled US–Iran peace round reignited oil-supply fears just as the May MSCI rebalancing forced over ₹6,800 crore of passive selling in RVNL, Kalyan Jewellers, Jubilant FoodWorks and Hyundai Motor India — a rare double-whammy of macro and mechanical selling.
04
2 March 2026
Monday
−1.29%War's opening shock
Sensex
−1,048 pts −1.29%
Closed 80,238.85
Nifty 50
−313 pts −1.24%
Closed 24,865.70
Why: The first trading session after US–Israel strikes killed Iran's supreme leader Ayatollah Ali Khamenei. Crude jumped ~9%, auto and oil & gas stocks led losses, and India VIX spiked 25% as the market priced in a wider regional war.
05
27 February 2026
Friday
−1.25%The calm before the storm
Sensex
−961 pts −1.17%
Closed 81,287.19
Nifty 50
−318 pts −1.25%
Closed 25,178.65
Why: Broad-based selling in auto, bank, FMCG, metal, realty and telecom on subdued global cues and building geopolitical tension — one day before the US–Israel strikes on Iran that would define the rest of Q1.