After a positive start, selling pressure was observed at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index shedding nearly 600 points during the intra-day trading on Tuesday. At 12pm, the benchmark index was hovering at 188,001.04, a decrease of 586.62 points or 0.31%. Selling was observed in key sectors, including automobile assemblers, cement, fertiliser, oil and gas expl