The Pakistan Stock Exchange (PSX) closed in the red on Monday after some experts revised downwards the growth estimate for fiscal year 2023 and the government issued an estimate of the damages caused by floods. The KSE-100 index closed at 41,859.30 points, down 449.81 points, or 1.06 per cent. The index saw an intraday low of 41,859.10 points shortly before trading was suspended for the day.