The Sensex at the Bombay Stock Exchange tumbled by 228 points to 19,688 in late morning trade today. The fall follows fresh selling in banking, PSU, refinery and FMCG sector stocks, triggered by lower Asian cues. The 30-share barometer, fell by 202 points in morning trade. The Nifty, National Stock Exchange index also moved down by 64 points to 5,844.