NEW YORK--(BUSINESS WIRE)--Investor demand for Depositary Receipts (DRs) remained strong during the first half of 2015, according to the findings of Citi’s Depositary Receipt Services 2015 Midyear Report. Citi’s World ex-U.S. Liquid DR Index, which offers insight into international investor sentiment toward non-U.S. markets, rose 4% in the first six months of 2015. Additionally, DR trading volumes increased 3% in the first half of 2015 to 81.3 billion shares, up from 78.7 billion shares during