New Delhi, June 10 :     The Securities and Exchange Board of India (Sebi) may soon tighten the rules for companies coming out with public issues. It is planning to make it mandatory for corporates to publish all the credit ratings assigned to it by the agencies. Officials of financial institutions, who were party to the decision-making process, said previously corporates had to approve the rating accorded to them by the rating agencies before it was published. ?If a particular company did not approve of a rating, it would not make it public and, instead, go to another credit rating agency for a fresh rating,? said sources. But the market regulator is planning to make it compulsory for companies to publish both the ratings. ?If a company goes in for a second rating, it has to publish that rating as well,? sources said. ?This is to prevent corporates from going credit-rating ?shopping? as they used to do,? Sebi officials said. This will also give investors a complete picture and not a skewed one-sided report on a company?s performance and its future prospects, they added. However, analysts fear that the ?shopping? for ratings could continue with companies asking rating agencies to book the job under a different head. ?A company can ask a credit rating agency to rate its issue but classify it under ?consultancy? or any other term if it did not approve of the rating,? said an analyst. ?Sebi must issue strict norms so that such misuse can be minimised,? the analyst said. The new ruling is expected to come in addition to the existing guideline which makes it mandatory to publish two ratings for issues over Rs 100 crore. Recently, Sebi has been tightening regulations related to credit rating. It is planning to bar all credit rating agencies from rating securities of their institutional promoters, especially if they have common chairmen and directors. These restrictions would be applicable in cases where there are common employees between the rating committees of credit rating agencies and their promoters. The new guidelines also said that institutions which hold more than 10 per cent stake in credit rating agencies would have to acquire a second rating from another agency. Meanwhile, Sebi has finalised the rating regulation norms and they would be brought into force next week, Sebi chairman D.R. Mehta said in Mumbai today, reports PTI. ?The rating regulations finalised by Sebi will be brought into force in three or four days, once the norms are in print,? Mehta said.