Buccaneer Energy Plc (AIM:BUCE, FRA:LMU1) could be approaching a re-rating as production growth and stronger cash generation begin to close the gap between the company's market value and the underlying worth of its assets. This was suggested in a new note from house broker SP Angel, which reiterated a 'buy' recommendation and 0.05p target price, arguing that the shares offer more than 350% upside to its risked net asset value.