Banks increased investments in new issues of OFZ - Central Bank The bond portfolio on banks' balance sheets increased by 0.4 trillion rubles in September. (+1.5%), mainly due to OFZ. Banks purchased new issues (+0.8 trillion rubles), partially offset by redemptions (-0.2 trillion rubles), payment of coupon income (-0.1 trillion rubles) and revaluation (-0.1 trillion rubles). Investments in mortgage bonds increased by 0.2 trillion rubles: original banks bought securities issues with DOM guarantees. RF. The portfolio of other bonds decreased by 0.2 trillion rubles.