Zerodha’s Nithin Kamath Warns STT Hike Will Not Curb Speculation: Why India’s Derivatives Market Faces a Bigger Risk

Zerodha co-founder and CEO Nithin Kamath has raised a strong red flag over the Indian government’s decision to sharply increase the Securities Transaction Tax (STT) on derivatives trading, arguing that the move may fail to reduce speculation and could instead make the market more volatile.

The warning comes in the wake of the Union Budget 2026, where Finance Minister Nirmala Sitharaman announced a steep hike in STT on both futures and options, triggering a sharp sell-off in equities and the worst Budget-Day performance for the Nifty index in years.

According to Kamath, the policy risks pushing traders further into options, the very segment regulators are trying to cool.

---

What Changed: The STT Hike Explained

In Budget 2026, the government proposed:

• STT on futures increased sharply

• STT on options raised by up to 150%

• Objective stated: discourage excessive speculation, especially among retail traders in derivatives

However, market reaction was swift and negative.

The Nifty index fell sharply, reflecting concerns that higher transaction costs could distort trading behaviour rather than fix underlying risks.

---

Nithin Kamath’s Core Argument: The Numbers Don’t Add Up

Kamath’s critique is rooted in hard data.

Key Reality of India’s Derivatives Market

• Around 95% of total derivatives volumes are already in options

• Futures trading now forms a minor share of activity

• Retail traders dominate options due to: – Lower upfront capital – High leverage – Asymmetric payoff structures

Kamath argues that raising STT on futures will only accelerate the shift toward options, which are:

• More speculative • More volatile • More prone to rapid losses for retail traders

In short, the tax hike may increase risk concentration instead of reducing it.

---

Why Options Are More Dangerous Than Futures

While futures involve mark-to-market discipline, options trading carries unique risks:

• High leverage with low capital

• Complex pricing driven by volatility and time decay

• Behavioural biases like overtrading and lottery-style bets

• Sharp expiry-day volatility

By making futures costlier, the STT hike could unintentionally push traders into instruments with poorer risk-reward outcomes, exactly the opposite of regulatory intent.

---

Market Impact: Why Nifty Reacted So Sharply

The equity market response highlighted broader concerns:

• Higher trading costs reduce liquidity

• Brokerages and market-linked businesses face earnings pressure

• Derivatives activity is a major revenue driver for exchanges

• Reduced participation could hurt price discovery

The Budget-Day fall in Nifty signaled that markets fear policy misalignment with market structure rather than a calibrated reform.

---

Business and Industry Impact

Who Is Affected Most

• Retail traders: Higher costs, greater risk exposure

• Brokerages: Potential drop in futures volumes

• Exchanges: Liquidity concentration risk

• Market stability: Higher intraday volatility possible

Kamath emphasized that taxes are blunt tools when dealing with complex market behaviour.

---

A Better Alternative: Product Suitability Rules

Instead of higher STT, Kamath suggests product suitability criteria, a globally accepted regulatory approach.

What That Means

• Define who can trade which products

• Use income, experience, and risk-profiling thresholds

• Limit access to complex derivatives for unsuitable participants

• Encourage education before leverage

Such measures target risk directly, rather than indirectly penalizing all participants through taxes.

---

Regulatory Debate: Control vs Market Efficiency

India’s derivatives market is one of the largest in the world by volume, but also one of the most retail-heavy.

The challenge regulators face:

• Protect retail investors

• Avoid killing liquidity

• Maintain India’s competitiveness as a trading hub

Kamath’s comments reflect a broader industry concern that over-taxation may damage market quality without solving speculation.

---

Looking Ahead: What Happens Next

Key questions markets are watching:

• Will derivatives volumes shift even more toward options?

• Will volatility rise due to expiry-centric trading?

• Will regulators revisit the structure of the STT hike?

• Could suitability norms or margin reforms follow?

The coming months will reveal whether the STT hike achieves its stated goal—or creates new risks.

---

Bottom Line

Nithin Kamath’s warning highlights a crucial truth about financial markets: policy intent must align with market reality.

Raising STT may look decisive, but without structural reforms, it risks:

• Increasing speculative behaviour

• Concentrating risk in options

• Making markets more volatile, not safer

As India’s derivatives ecosystem matures, precision regulation may matter more than punitive taxation.

---

Disclaimer This article is for informational purposes only and does not constitute investment or regulatory advice. Market data, policy interpretation, and opinions are based on publicly available information and industry commentary. Readers should consult qualified professionals before making trading or investment decisions.

---