Falling for the third straight session, the Sensex at the Bombay Stock Exchange declined 65 points, or 0.3 percent, to close at a new one-month low of 19,546, today. The Sensex had lost over 600 points in the last two trading sessions. The Nifty at the National Stock Exchange fell 20 points or 0.3 percent, to 5,919.Stock markets in Japan, China, Hong Kong, South Korea and Singapore ended on a mixed note.