Karachi, (PPI Bot): National Refinery (NRL) closed the trading day higher after active trading. The stocks opened at 265 PKR and increased to 273.95 PKR at close. The low and high during the session were 264.8 PKR and 267.44 PKR, with a substantial volume of 2,479,348 shares traded. The closing price was set at 263.77 PKR.