To increase participation of non-resident Indians, some categories of government securities will be opened fully for non-resident investors, apart from being available to domestic investors as well.Finance Minister Nirmala Sitharaman announced in the Union Budget on Saturday that NRIs will be allowed to invest in certain categories of GSecs.One of the Budget proposals is that the limit for foreign portfolio investment (FPI) in corporate bonds, currently at 9 per cent of outstanding stock, will be increased to 15 per cent of the outstanding stock of corporate bonds. This will in turn open avenues for foreign investments in the debt market.