RIL, Tata Motors and Infy top traded stock futures contracts in F&O segment.The Nifty January 2021 futures were at 13,981.10, a premium of 13.60 points to the Nifty's spot closing of 13,967.50. Turnover on the National Stock Exchange's futures & options (F&O) segment was Rs 41.57 lakh crore compared with Rs 34.54 lakh crore in the previous session. In the cash market, the Nifty 50 index tumbled 271.4 points or 1.91% to 13,967.50. The NSE's India VIX, a gauge of market's expectation of volatility over the near term, jumped 4.93% to 24.3925. RIL, Tata Motors and Infosys were the top traded stock futures contracts in F&O segment for January expiry.