Given there is a proposed merger btw PKO and OXX, and given the directors of OXX have full knowledge of PKO and its arbitration status, and buyback by OXX directors would be considered a potential insider trader issue.
After the arbitration result has been announced and all information is out, then a buy back would be ok. IMO
Also OXX back back is largely just to prop up the sp, potentially just prior to the merger. So a distortion.