F&O profits at risk: How much one lot of Nifty futures and options costs after the STT hike

The Union Budget 2026 has increased Securities Transaction Tax (STT) on equity derivatives, impacting futures and options trading costs. STT on Nifty futures has risen from 0.02% to 0.05%, increasing the cost per lot by approximately Rs 500. Options trading also sees a 50% STT hike on premiums, raising concerns about market liquidity and foreign participation.