Investor sentiments remained positive at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining nearly 900 points during the opening minutes of trading on Monday. At 9:33am, the benchmark index was hovering at 186,247.76, up by 875.56 points or 0.47%. Buying was observed in key sectors, including automobile assemblers, cement, commercial banks, fertiliser, oil and gas ex