Derivatives Market Update – Thursday, 18 December 2025

Nifty Derivatives Overview The Put/Call Ratio (PCR – OI) for Nifty has declined from 0.90 to 0.77, indicating increasing cautiousness and mild bearish bias in the near term. Options Data Maximum Call OI: 26,000 → 25,900 Maximum Put OI: 25,800 → 25,500 Option Writing Activity Call writing: 25,900 followed by 26,000 Put writing: 25,800 followed by 25,750 Broader range: 25,300 – 26,200 Immediate range: 25,600 – 26,000 Bank Nifty Derivatives Overview (CMP: 58,926) Monthly Options Data Maximum Put OI: 59,500 → 59,000 Maximum Call OI: 59,500 → 60,000 Both Call and Put writing are witnessed at the 59,500 strike, suggesting strong resistance and support concentration at this level. Expected trading range: 58,500 – 59,500 FII & DII Activity Derivatives Segment FIIs built short positions in index futures Call and put selling seen in index options Short buildup observed in stock futures Cash Market FIIs: Net buyers worth ₹1,449 crore DIIs: Net buyers worth ₹587 crore 📉 FII Index Long–Short Ratio: Declined to 8.16%, reflecting increased short exposure. Technical View & Key Levels Nifty Outlook Below 25,900, weakness may extend towards 25,700 → 25,600 Upside resistance seen at 25,950 → 26,050 Bank Nifty Outlook Below 59,000, downside possible towards 58,750 → 58,500 Resistance levels: 59,250 → 59,500 Conclusion Derivatives data combined with price action suggests a range-bound to mildly weak bias for both Nifty and Bank Nifty unless key resistance levels are decisively crossed. Disclaimer: Investments in securities markets are subject to market risks. Read all related documents carefully before investing.