Positive momentum was observed at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining over 500 points during intra-day trading on Tuesday. At 12pm, the benchmark index was hovering at 182,876.49, an increase of 536.11 points or 0.29%. Buying momentum was observed in key sectors, including automobile assemblers, cement, fertiliser, oil and gas exploration companies, OM