Dividend stocks: Shares of six listed companies — Punjab & Sind Bank, Alkyl Amines, Motilal Oswal, Tide Water Oil, Nath Bio-Genes and Agro Tech Foods are going to trade ex-dividend today. Punjab & Sind board has declared final dividend of ₹0.48 apiece, Alkyl Amines is trading ex-dividend stock today for payment of ₹10 per share final dividend to its eligible …