The Indian stock market witnessed a massive relief rally today as the BSE Sensex jumped 600 points in early trade, tracking a surge in global optimism. This bullish momentum on Dalal Street follows a historic ruling by the US Supreme Court (SCOTUS) on Friday, which struck down sweeping import tariffs originally imposed under the administration of President Donald Trump.

The market capitalization of BSE-listed companies grew by approximately ₹3.8 lakh crore within the first hour of trade, as retail and institutional investors cheered the removal of a significant trade overhang that had plagued Indian exporters for months.

What Did the US Supreme Court Decide?

In a landmark 6-3 majority decision delivered on February 20, 2026, the US Supreme Court tariff ruled that President Trump exceeded his constitutional authority by imposing broad "Reciprocal Tariffs" under the International Emergency Economic Powers Act (IEEPA) of 1977.

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The Core of the Ruling

Lack of Authority: The Court held that while the IEEPA allows the President to "regulate" commerce during emergencies, it does not grant the power to unilaterally impose taxes or duties, a power strictly reserved for the US Congress under Article I of the Constitution.

Invalidated Tariffs: The ruling effectively nullifies the aggressive tariff structure that had seen duties on global imports, including those from India, skyrocket to as high as 50% in certain categories.

Refund Possibility: While the court did not finalize the mechanics, it opened the door for importers to claim refunds for nearly $175 billion in collected duties, providing a massive liquidity boost to global trade.

Why Did Sensex Rally?

US tariff decision impact on India as Sensex today hit a high of 83,462, while the NIFTY 50 comfortably crossed the 25,700 mark. Several key factors are driving this surge:

Relief for Export Giants: US tariffs had significantly hurt India’s gems, jewelry, and textile sectors. The removal of these punitive duties restores the price competitiveness of Indian goods in the world's largest economy.

FII inflows India: Foreign Institutional Investors (FIIs), who had been net sellers due to trade uncertainty, are expected to pivot back to Indian equities as the "geopolitical risk" premium fades.

Rupee & Crude Oil Support: The US Dollar Index (DXY) weakened following the ruling, helping the Indian Rupee (INR) appreciate to 90.75 per dollar. Simultaneously, a drop in crude oil prices to around $71 per barrel (Brent) due to easing Middle East tensions provided a double boost to Indian markets.

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Sector-Wise Impact

IT Stocks 

While IT services are not directly hit by tariffs, the US contributes over 60% of revenue for the sector. Improved trade relations signal a better discretionary spending environment for US corporations. IT stocks surge today. Key Movers: Infosys, TCS, and HCLTech saw gains of 1.5–2%.

Textiles & Pharma

These sectors were the hardest hit by Trump-era duties.

Impact: Export-heavy textile mills like Welspun Living and KPR Mill surged over 5%.

Pharma: Generic drug makers, which supply nearly 40% of the US market, are seeing improved margin outlooks now that the threat of additional retaliatory taxes has diminished.

Metals & Auto Components

Steel and aluminum exporters, along with auto-part manufacturers like Bharat Forge, gained significantly as the landed cost of their products in the US is set to fall.

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Global Market Reaction

The ruling triggered a "risk-on" sentiment across the globe:

Wall Street: The S&P 500 and Nasdaq ended Friday higher, with retail and tech stocks leading the gains.

Asian Markets: Indices in Tokyo, Seoul, and Hong Kong followed India’s lead, opening in the green as the "trade war" fears began to subside.

The "Trump Pivot": Despite the ruling, President Trump has already announced a move to re-impose a 15% tariff using alternative legal routes (Section 122). However, markets view this as a "stopgap" measure that is far less severe than the previous arbitrary levies.

"The SCOTUS ruling is a massive victory for the rule of law in global trade. For Indian retail investors, this means the 'tariff shock' is effectively behind us. While volatility may persist, the fundamental earnings visibility for Indian exporters has improved overnight." — Vikram Shah, Senior Market Strategist.

"We are seeing a 'Reset' in India-US trade. With the illegal 50% tariffs gone, India is now better positioned than its peers like China and Vietnam, who still face higher specific duties. This is a structural positive for the Indian manufacturing story." — Anjali Murthy, Institutional Equity Analyst.

What Should Investors Do?

Short-Term Strategy

Investors should avoid "chasing" the rally blindly. While the 600-point surge is positive, President Trump’s intent to use other legal avenues for a 15% tariff means volatility will remain. Focus on quality large-cap exporters who have strong balance sheets.

Long-Term View

The long-term outlook for the Indian stock market remains robust. The "China+1" strategy is strengthened by this ruling, as India emerges as a more stable and legally predictable trade partner for the US.

Risks to Watch

New executive orders from the White House using the Trade Act of 1974.

Upcoming India GDP data and RBI MPC minutes.

Fluctuations in the US Dollar Index.

Conclusion

The US Supreme Court’s decision to strike down Trump-era tariffs has removed the single biggest cloud over global trade in 2026. For India, this translates into lower costs for exporters, a stronger rupee, and a return of foreign capital. While the rally is a welcome sign for Sensex today, investors must monitor the next move from Washington to see if this trade relief is permanent or merely a temporary breather.