Goldman Sachs Downgrades Turkcell Iletisim To Neutral By: Benzinga via Benzinga June 09, 2015 at 08:44 AM EDT Analysts at Goldman Sachs downgraded Turkcell Iletisim Hizmetleri A.S. (ADR) (NYSE: TKC) from Buy to Neutral. Turkcell Iletisim ... Read More >> Related Stocks: Turkcell Iletisim Hizmetleri As ADR