Petra Diamonds (LSE: PDL) has just released its interim financial results for six months ending 31 December 2023. The company has already published its operational and debt figures for the period, and therefore the key focus is on costs, profits and future guidance. Generally the figures have come in well ahead of our forecast in percentage terms (see Fig 1) a reflection of the increasing efforts management is bringing to bear on the cost base. They are battling an average group diamond price ....