Nuveen Mortgage and Income Fund's objective is to generate high current income through opportunistic investments in securitized credit. The Fund invests at least 65% of its managed assets in mortgage-backed securities (MBS), including residential MBS and commercial MBS, and up to 35% in non-mortgage related asset-backed securities (ABS) including but not limited to any asset that generates reliable cash flows including collateralized loan obligations as well as pools of consumer auto loans, credit card receivables, aircraft leases and maintenance agreements, timeshare agreements, and solar photovoltaics. A maximum of 5% can be invested in catastrophe bonds, which are backed by a secured collateral account and considered by the Fund to be ABS. The fund uses leverage.