The Pakistan Stock Exchange (PSX) has experienced a welcome change after reverting to the old trading system as the new system introduced last week encountered problems and caused trade to suspend. The KSE100 index rose by 761 points on Monday, closing at 46,946. The turnover also improved and 430 million shares were traded in the market. The rally seems to continue on Tuesday as the KSE100 index rose by 229 points in the first half-hour of the trading. As soon as the old trading system was restored on Monday, the market experienced a welcome change, SAMAA TV's Rizwan Alam reported. Authorities decided to revert to the old system over the weekend after initially announcing tha...