The bottom line of Pakistan State Oil (PSO) turned negative in the last quarter of 2022-23 as its unconsolidated loss amounted to Rs4.6 billion versus a three-month profit of Rs21.4bn a year ago. In the preceding quarter of January-March, the state-owned oil marketing company recorded a net profit of Rs13.6bn. As a result, PSO’s earnings totaled Rs5.6bn in 2022-23, down 93.4pc from the precedin