Nifty and Sensex traded flat on December 6 as the RBI maintained the repo rate at 6.5% for the eleventh consecutive time, while cutting the CRR by 50 basis points to inject Rs 1.16 lakh crore into the system. PSU banks, auto, and FMCG stocks gained, with Bajaj Auto, Axis Bank, Titan Company, BPCL, and ITC leading the Nifty's top gainers. The market showed resilience amid a choppy session, with 2,076 shares advancing against 1,289 declining.