Deutsche Bank Securities is the US arm of German banking colossus Deutsche Bank. Its Deutsche Bank USA is the only investment bank physically located on Wall Street; it offers securities brokerage and investment advisory services to both domestic and international private clients and institutions and correspondent clearing services to broker-dealers. Deutsche Bank Securities also provides investment products, brokerage, and financial advice to wealthy individual investors through its Deutsche Bank Alex. Brown division. Deutsche Bank opened its first branch in New York in 1979 and now has offices in some 90 cities in nearly 30 US states.