Karachi: Altern Energy, listed under the company code ALTN and number 824, observed a considerable gain in its stock price at the close of trading on the Pakistan Stock Exchange. Opening at PKR 23.5, the stock closed at PKR 24.57 after trading between a low of PKR 23.25 and a high of PKR 23.91 throughout the day. The company saw a significant trading volume of 2,121,000 shares, with the closing price settling at PKR 22.86.