DUBAI, Aug 20 (Reuters) - Saudi Arabia's Capital Market Authority said on Sunday it had approved Goldman Sachs' request to conduct dealing, underwriting and custody services in the kingdom.

The bank was "now authorised to conduct dealing as principal, an agent, an underwriter, managing investment funds, discretionary portfolio management, arranging, advising, and custody activities," the regulator said in a statement. (Reporting by Tom Arnold; Editing by Andrew Torchia)