Post-budget analysis continued in the second week of February as markets digested the Securities Transaction Tax (STT) hike announced in Budget 2026-27. STT on futures was raised from 0.02% to 0.05% (150% increase) and options premium STT from 0.1% to 0.15% (50% increase), effective April 1, 2026.

On Budget Day (February 1), BSE Sensex plunged 1,547 points (-1.88%) to close at 80,723 and Nifty50 fell 495 points (-1.96%) to 24,825 — the steepest Budget-day fall in six years. Markets recovered the next day with Sensex gaining 944 points. About 91% of retail F&O traders ended in loss in FY25, which was the government's stated rationale for discouraging speculative derivatives trading.