ISLAMABAD    -   The Pakistan Stock Exchange (PSX) on Monday witnessed bearish trend as the KSE 100 index closed at 39,072.47 points against 40,070.83 points on the last working day, with negative change of 998.36 points (2.49%).  A total 409,945,188  shares were traded during the day compared to the trade of 348,589,710 shares the previous day whereas the price of shares stood at Rs12.589 billion against Rs12.441billion previous day.  As many as 417 companies transacted shares in the stock market, 31 of them recorded gain and 372 sustained losses whereas the share price of 14 companies remained unchanged.  The three top traded companies were Hascol Petrol with a volume of 60,427,500 shares and price per share of Rs17.37, Unity Foods Ltd with a volume of 31,983,500 and price per share of Rs15.08 and K-Electric Ltd with a volume of 29,159,500 and price per share of Rs4.04.