Shares of Container Corporation of India (Concor) turns ex-bonus on Wednesday. The PSU major had announced one bonus share for every four shares held in the firm. This would reflect in the F&O segment as well. So the market lot would rise to 625 from 500 now. Currently, the promoter — the Central Government — holds 56.75 per cent stake in Concor, while the public, including LIC, Government of Singapore and Aberdeen, holds the rest.