Extending its losses for the third straight session, the Sensex at the Bombay Stock Exchange fell 34 points, or 0.2 percent, to 16,467, after volatile trade, on profit-booking by investors, amid weak European markets, today. The Nifty at the National Stock Exchange lost 6 points, or 0.1 percent, to 4,941.Stock markets in Japan, China and Singapore were largely subdued.