KARACHI           -         Pakistan Stock Exchange (PSX) witnessed a bearish trend as KSE-100 closed at 40290.74 points as compared to 40473.18 points on the previous working day with negative change of 182.44 points (-0.45 per cent). According to Pakistan Stock Exchange (PSE), total volume of shares traded was 556,146,151 while value of shares traded during day stood at 19,348,179,284. As many as 419 companies transacted shares in stock market, out of total 179 recorded gains and 220 sustained losses, whereas share price of 20 companies remained unchanged during the day.