Recently, the Indian government implemented a significant increase in Securities Transaction Tax (STT) on Futures and Options (F&O) trades, sparking concerns across the trading community about possible impacts on market activity. Starting April 1, 2026, the STT on futures contracts rose from 0.02% to 0.05%, and on options, it increased from 0.10% to 0.15%. This hike—reaching up to 150% more in some cases—is aimed primarily at curbing excessive speculative trading and high-frequency strategies, helping to stabilize the derivatives market.

Given these changes, investors and market watchers have been keen to understand whether this tax increase has led to a drop in trading volumes, particularly in the derivatives segment.

Here’s a look at what the data and trends reveal:

1. Mixed Impact on Trading Volumes
Data from leading exchanges shows a nuanced picture. While the National Stock Exchange (NSE), which dominates the F&O market, has experienced some decline in options premium turnover—down by approximately 28% month-on-month—the Bombay Stock Exchange (BSE) surprisingly reported a rise in F&O activity, with its average daily notional turnover surging nearly 20% in April compared to March.

2. Shift in Market Share Between Exchanges
The increase in STT appears to have triggered some market migration between these two major exchanges. BSE’s share of the total F&O notional turnover increased from 44% in March to 55% in April, while NSE’s share correspondingly dropped from 56% to 45%. Despite this shift, NSE continues to maintain a strong dominance, especially in options premium turnover, holding around 66% share compared to BSE’s 34%.

3. The Bigger Picture for Traders
The raised STT rates increase the cost of F&O trades, particularly impacting high-frequency traders and intraday players whose profit margins rely on tight spreads and rapid trades. Many experts believe this hike will curb speculative and excessive trading in the short term, pushing traders to rethink strategies and focus more on longer-term positions.

4. Market Volatility and External Factors
It’s also important to note the broader global and domestic factors influencing market volumes simultaneously. For instance, geopolitical tensions and mixed sectoral performances can affect overall trading sentiment alongside tax changes.

5. Exchanges’ Response for Enhancing Liquidity
In response to these developments, BSE has cut some of its trading charges to enhance liquidity and attract fresh trading interest, which might explain its uptick in F&O activity despite the tax hike.

In summary, while the STT hike on F&O has introduced higher trading costs—leading to a dip in volumes on the NSE and a shift toward the BSE—the overall impact on volumes is complex and influenced by multiple factors. The market is adjusting as traders recalibrate strategies in light of increased transaction costs and broader economic signals.

For investors and traders, staying informed about tax policy changes and market dynamics remains crucial. The STT hike serves as a reminder that regulatory shifts can reshape trading landscapes, often in unexpected ways, requiring flexibility and nuanced understanding to navigate successfully.