Falling for the fifth straight session, the Sensex at the Bombay Stock Exchange lost 191 points, or 1.1 percent, to 17,401, today, ahead of the Reserve Bank's credit policy announcement, and amid fraud charges against Goldman Sachs by the US Securities and Exchange Commission. The Nifty at the National Stock Exchange lost 59 points, or 1.1 percent, to 5,204.Stock markets in Japan, China, Hong Kong, Singapore and South Korea slid between 1.5 percent and 4.8 percent.