This Practice Note explains the tax treatment of entities within the charge to UK corporation tax who invest in open-ended investment companies (OEICs) and authorised unit trusts (AUTs), together referred to for tax purposes as authorised investment funds (AIFs). It looks at the tax treatment of distributions and disposals of investments where AIFs are bond funds or equity funds. It looks at the corporate streaming rules, qualifying investments test, equalisation and anti-avoidance rules. This Practice Note is produced in partnership with Camilla Spielman of Eversheds Sutherland.