Sensex, Nifty updates 20 December 2023: After opening in record highs, market benchmark indices plunged into the red range on Wednesday. At 3.30 pm, the BSE Sensex declined 930.88 points to 70,506.31, with the Nifty losing 302.95 points to 21,150.15. Sharp unwinding is reflected in mid-cap and small-cap stocks. The Nifty small-cap 100 recorded a percent change of -3.63, while the Nifty mid-cap 100 experienced a change of -3.27%. This was the worst session in three months for small-caps and 12 months for mid-caps.