Stocks maintained their upward momentum at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index crossing the 188,000 level during the opening minutes of trading on Tuesday. At 9:40am, the benchmark index was hovering at 188,545.00, an increase of 783.31 points or 0.42%. Buying interest was observed in key sectors, including automobile assemblers, commercial banks, fertiliser,