NMDC Ltd. has announced that Dec. 27 will be the record date to determine the eligibility of shareholders for the issuance of bonus shares.The bonus issue on Friday will be in a 2:1 ratio, meaning two new equity shares will be issued for every one existing share held.Shareholders must ensure the stock is delivered to their accounts by Thursday on a T+1 settlement basis to qualify for the bonus issue.The allotment date for the bonus shares is set for Dec. 30.