The 100-index of Pakistan Stock Exchange (PSX) shed 42.89 points on Tuesday, a nominal negative change of 0.08 per cent, closing at 51,027.94 points against 51,070.83 points the previous day. A total of 321,403,857 shares valuing Rs 11.091 billion were traded during the day as compared to 364,070,705 shares valuing Rs 15.930 billion the previous day.As many as 342 companies transacted their shares in the stock market; 143 of them recorded gains and 171 sustained losses, whereas the share price of 28 companies remained unchanged. The three top-trading companies were Pak Refinery with 33,555,439 shares at Rs 18.64 per share, Fauji Foods Ltd with 29,104,963 shares at Rs.6.98 per share and Bankislami Pak with 15,533,332 shares at Rs19.19 per share. Sanofi-Aventis witnessed a maximum increase of Rs 56.44 per share price, closing at Rs 808.94, whereas the runner-up was Pak Services with a Rs 47.83 rise in its per share price to Rs 749.83. Rafhan Maize witnessed a maximum decrease of Rs 100.00 per share closing at Rs 8,000.00, followed by Philip Morris Pak with Rs 39.85 decline to close at Rs 491.55.