The board of directors of National Peroxide, which met today, approved a proposal for sub-division of the shares of the company from the existing face value of Rs 100 per share to Rs 10 per share.According to a release issued by the company to the BSE today, the board meeting also approved Issue of bonus shares in the ratio of 3:2 i.e three bonus shares for every two shares held on the record date.The stock dropped 4.7% (Rs 484) to Rs 9,808 on the BSE today with a volume of 2,566 shares.