TCS Plunges 9% in Biggest Decline Since March 2020, Wiping Rs 80,000 Crore Market Cap

The Quick Take

• TCS shares plunged as much as 9% on June 3, 2026, putting the stock on track for its biggest single-day decline since March 2020 — a pandemic-era benchmark.
• The sell-off wiped out nearly Rs 80,000 crore in market value from TCS, one of India's most widely held stocks.
• Technical analysts identify a key support level that will determine whether the TCS decline stabilises or extends into a deeper correction phase.

Tata Consultancy Services fell as much as 9% on June 3, 2026, its most severe single-day intraday decline since March 2020 when pandemic uncertainty triggered a broad market meltdown. The Rs 80,000 crore market cap destruction in a single session from India's second-largest company by market capitalisation is the most significant single-stock event on the BSE/NSE today, affecting millions of retail investors who hold TCS directly through Demat accounts and indirectly through index funds, Nifty 50 ETFs, and diversified equity mutual funds that hold TCS as a top-five constituent. Trading volumes surged to nearly four times the recent daily average, confirming institutional rather than retail-driven selling dominated the session.

The March 2020 comparison is significant for context: the 2020 decline reflected broad pandemic uncertainty — an existential shock with no fundamental earnings data to anchor — while the June 2026 decline is driven by the more specific structural concern about AI disruption to TCS's traditional IT services revenue model. This distinction matters for recovery timeline assessment: the pandemic-era decline recovered sharply within months as visibility returned, while a structural AI disruption thesis, if validated by actual earnings deterioration, would take longer to reverse. TCS management has been investing heavily in AI service capabilities and has announced AI-related deals, but the June 3 sell-off suggests the market is pricing these investments as insufficient to offset the disruption risk in the near term.

The technical support level that CNBC TV18 identifies as "the key level" for TCS will be critical for near-term price action — if the stock holds that support through the week, it would signal the sell-off is a sentiment-driven overreaction to the AI disruption narrative rather than a fundamental value shift. Watch TCS's official response to the sell-off — whether management holds an emergency analyst call or issues a statement defending its AI transition progress — as a signal of how seriously the company views the market's reaction. The macro variable is TCS's upcoming quarterly earnings: a strong TCV and AI revenue beat would be the clearest fundamental reversal catalyst for this technically significant support test.

Synthesized from 1 source.