Stock market crash: 7 triggers behind Sensex, Nifty fall

Market slide breaks a winning run

Indian equities extended losses in a sharp, risk-off session as the Sensex and Nifty 50 came under heavy selling pressure. The move followed a mix of global weakness, renewed pressure on information technology shares, and persistent foreign fund outflows. In separate sessions referenced in the market coverage, benchmarks also ended a five-session winning streak after a selloff in IT stocks linked to a weaker outlook from Accenture Plc. Traders pointed to uncertainty around US President Donald Trump’s tariff stance, alongside fragile risk appetite amid geopolitical headlines.

A key marker of the day’s damage was the hit to overall market wealth. Around ₹4.61 lakh crore in investor wealth was wiped out as the combined market capitalisation of BSE-listed companies fell to about ₹475 lakh crore. Heavyweights such as Reliance and Zomato were cited among the stocks seeing strong selling pressure.

1) Weak global cues and Asia-led risk-off mood

Global cues were a major drag, with a sharp correction in South Korea in focus. South Korea’s stock exchange triggered a circuit breaker after the KOSPI plunged 8%, halting trading for 20 minutes, as investors booked profits following a record rally driven by semiconductor stocks and foreign inflows. Wider Asian weakness also fed into sentiment, with South Korea’s Kospi and Hong Kong’s Hang Seng index reported down nearly 2% in one of the sessions covered.

US market cues also mattered. US indices ended sharply lower on a Thursday session referenced in the coverage, with the Nasdaq Composite down 1.59%, the S&P 500 down 1.23%, and the Dow Jones Industrial Average down 1.2%. The combination of risk-off moves across regions reduced appetite for high-beta sectors and tightened liquidity conditions for emerging markets.

2) Persistent FII selling adds pressure

Foreign Institutional Investors remained a consistent overhang. The reporting highlighted multiple instances of net selling, including ₹635.91 crore sold on a Monday session. In another session, FIIs offloaded ₹1,025 crore after three days of net buying, and in yet another, foreign investors sold ₹6,030 crore.

Additional data points included FIIs selling ₹2,150.51 crore on a Thursday session, and a separate reference to net selling of about ₹3,263 crore as the selling streak extended to ten sessions in that context. While these numbers come from different days, the common thread was sustained pressure from overseas flows, which weighed on sentiment and limited any rebound attempts.

3) Rupee weakness and currency-linked risk

Currency moves added another layer of stress. The rupee was reported weakening by 6 paise to 94.69 per US dollar in one session as the greenback strengthened and hovered near a 13-month high. A separate market update also cited the rupee down 0.07% at 90.95 per US dollar on a Tuesday.

The market narrative linked currency depreciation to potential foreign capital outflows and pressure on equities. A weaker rupee can tighten financial conditions for import-heavy segments and can affect investor positioning, especially in periods of global uncertainty.

4) IT sector selloff deepens on Accenture and AI concerns

IT was repeatedly flagged as the biggest drag on benchmark performance across the sessions described. The Nifty IT index fell up to 2% in one update and ended the session more than 2% lower. In another session, it fell around 3% and was described as heading for its worst week in more than four months.

Stock-level moves were also sharp. Infosys and TCS declined up to 3% in one session, and TCS, Infosys, and Wipro each fell over 3% in another. Earlier, IT majors including Infosys, TCS, Tech Mahindra, and HCLTech were reported down as much as 8% after Accenture shares fell 11% on Wall Street.

The triggers cited included Accenture lowering the upper end of its annual revenue growth forecast, and concerns around AI-driven disruption. The coverage also referenced Anthropic’s Claude-related tools as a renewed focus point, including a note that the Nifty IT index has declined nearly 9% since the launch of a new legal AI tool by Anthropic, and that IT selling intensified amid fears about disruption to traditional software models.

5) Tariff uncertainty keeps risk appetite weak

Uncertainty over US trade policy was another recurring theme. The coverage cited investor caution linked to US President Donald Trump’s tariff policies. It also referenced a post on Truth Social in which Trump warned that countries attempting to “play games” with a recent court ruling would face significantly higher tariffs.

These trade headlines contributed to a defensive tone, particularly for export-sensitive sectors such as IT. When combined with weak global cues, trade uncertainty can reinforce a broader preference for cash and lower risk exposures.

6) Geopolitics and oil remain on the radar

Geopolitical uncertainty featured prominently, including references to the uncertainty over the outcome of US-Iran peace talks. One update said planned talks between US and Iranian negotiators aimed at ending Middle East conflict would not take place on a Friday after US Vice President JD Vance shelved plans to travel to Geneva. Another update noted a new round of talks was scheduled in Geneva, while also citing Trump saying he was considering a strike if Tehran failed to reach a deal.

Oil prices were also mentioned as a driver of risk sentiment in separate sessions, including a reference to a massive spike in crude oil amid intensified conflict. Another update cited Brent crude up 0.37% at USD 67.71 per barrel, highlighting concerns that higher crude can worsen inflation pressures and widen India’s trade deficit.

7) RBI policy pause and derivatives expiry add to volatility

Domestic policy and positioning factors contributed to volatility. The RBI was reported to have kept policy unchanged, with the Monetary Policy Committee retaining the repo rate at 5.25% with a neutral stance, after a 25 basis point cut in December. The decision was framed in the context of geopolitical uncertainties.

Separately, the coverage noted the monthly expiry of Nifty 50 derivatives, a period when traders often square off or roll positions. Such sessions can amplify intraday swings, especially when combined with heavy sectoral selling and weak global cues.

Key facts snapshot

Market impact: what changed for investors

The immediate impact was a broad reduction in risk appetite, with IT, metals, consumer durables and realty stocks mentioned among the pressured segments. The repeated references to IT-led declines show how export-facing sectors can amplify index moves when global tech sentiment weakens. Persistent FII selling, cited across multiple sessions, added to the fragility by reducing the market’s ability to absorb sectoral shocks.

Currency and commodity signals reinforced the cautious tone. The rupee’s weakness, alongside oil-related worries tied to Middle East developments and Brent’s rise in another update, underlined how macro variables can quickly feed into equity positioning during volatile periods.

Why this episode matters

The selloff combined several risk channels at once: overseas flows, global equities, currency, oil, geopolitics, and sector-specific worries in IT linked to both demand and AI disruption. When these factors align, market moves can become sharper, especially around derivatives expiry when positioning adjustments are concentrated.

The coverage also shows that the same sector can face multiple simultaneous catalysts. For Indian IT, the pressure was tied to Accenture’s outlook, soft demand signals flagged by global brokers, and the broader debate over AI changing the economics of software and services.

Conclusion

The Sensex and Nifty declines reflected a convergence of weak global cues, renewed IT selling, FII outflows, rupee weakness, and trade and geopolitical uncertainty. The next market moves will likely continue to track foreign flow data, currency direction, IT sector headlines linked to global demand signals, and any developments around tariffs and US-Iran negotiations.