Indian stock benchmarks Sensex and Nifty fell for the fourth straight day on Wednesday after RBI raised the repo rate by 50 basis points to 4.90%. While Sensex fell 214.85 points to close at 54,892.49, Nifty fell 60.10 points today to close at 16,356.25. Sensex has fallen 926.28 points while Nifty has fallen 271.25 points in last four trading sessions.