**NSE F&O Open Interest Surge** Activity in the NSE Futures & Options segment intensified on **January 20, 2026**, with specific counters witnessing substantial accumulation. Five stocks recorded a significant buildup in positions, signaling increased market participation and potential volatility. Leading this trend were **Oberoi Realty** and **Persistent Systems**, which both registered a growth of over **10%** in futures open interest. This sharp rise indicates a strong shift in trader sentiment and positioning within these specific derivatives contracts.