SEBI Launches Intraday Strike Prices Following 1.5% Price Movement to Boost Market Liquidity

Market snapshot: The Securities and Exchange Board of India (SEBI) has announced a significant shift in the operational framework of derivative trading by allowing the introduction of new strike prices during active market hours. This regulatory update aims to provide market participants with more granular options for hedging and risk management during periods of rapid price discovery.

Data Snapshot

• Trigger Threshold: 1.5% intraday movement in the underlying index or stock.
• Incremental Strikes: 3-5 new strike prices per side (In-the-money/Out-of-the-money).
• Segment Focus: Equity Derivatives (Futures & Options).
• Implementation: Immediate effect across NSE and BSE.

What's Changed

• Static vs Dynamic: Previously, strike prices were fixed at the start of the trading day; now, they adapt to intraday volatility.
• 1.5% Delta: The introduction of a specific percentage-based trigger standardizes when new strikes are introduced.
• Liquidity Gaps: Reduces the risk of 'missing strikes' when a stock or index moves beyond the pre-set morning range.

Key Takeaways

• Enhanced Hedging: Traders can now access strikes closer to the current market price even during massive rallies or sell-offs.
• Reduced Impact Cost: Dynamic strikes will likely distribute liquidity more efficiently across the option chain.
• Market Maturity: Brings Indian derivative markets closer to global standards where dynamic strike introduction is common during volatility.

SAHI Perspective

This move by SEBI is a proactive step toward managing the 'gamma risk' often faced by retail and institutional participants during sharp market moves. By ensuring that there is always a liquid strike available near the 'At-The-Money' (ATM) mark, SEBI is reducing the friction caused by deep out-of-the-money options becoming active too quickly without sufficient market-making depth.

Market Implications

The immediate impact will be seen in the narrowing of bid-ask spreads for options during volatile sessions. For the sector, this strengthens the operational robustness of the NSE and BSE. Capital allocation may shift toward more complex hedging strategies now that strike availability is guaranteed even during 2%+ intraday moves.

Trading Signals

Market Bias: Neutral

The policy change is structurally positive for market efficiency but does not dictate a directional bias. The 1.5% trigger ensures better price discovery during volatile regimes.

Overweight: Exchanges, Financial Technology, Diversified Financials

Trigger Factors:

• Movement of Nifty/Bank Nifty > 1.5% intraday
• Option chain volume distribution changes
• VIX levels exceeding 20

Time Horizon: Near-term (0-3 months)

Industry Context

The Indian derivatives market has seen a surge in retail participation, leading to concerns about volatility management. This policy addresses the structural need for continuous strike availability, preventing market participants from being 'stuck' in illiquid, far-from-the-money strikes when the underlying moves significantly.

Key Risks to Watch

• Systemic Load: Increased strike prices may increase the data load on exchange trading systems.
• Fragmentation: Too many strikes could potentially fragment liquidity across too many contracts.
• Over-trading: Easier access to strikes might encourage excessive intraday turnover.

Recent Developments

In the last 90 days, SEBI has expanded the T+0 settlement cycle to more scrips and tightened norms for SME IPO listings to prevent price manipulation. Additionally, discussions on increasing the lot size for index options are ongoing to ensure market stability.

Closing Insight

SEBI’s focus remains on institutionalizing the retail-heavy F&O segment. By introducing dynamic strike prices, the regulator is prioritizing market depth over simple availability, ensuring that traders have the tools to manage risk even when the market moves 1.5% in a single session.

FAQs

How does the 1.5% movement trigger work for new strikes?

When the price of an underlying asset moves by 1.5% from its previous close or opening, the exchange is now authorized to introduce new strike prices above or below the current range to ensure traders have access to 'At-The-Money' options.

What does this mean for retail option buyers?

Retail participants will likely see better liquidity and narrower spreads during volatile days, as new strikes will be available to trade immediately rather than waiting for the next day's market open.

Will this lead to higher premiums in the option chain?

Not necessarily. While it provides more choices, premiums are driven by implied volatility. However, more strikes could lead to more efficient pricing of risk, potentially stabilizing premiums during sharp moves.

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