(LSE: BARC) (NYSE: BCS.US) announced earlier this year that it was going to wind down its investment banking operations. Technically, this move is somewhat of a strategic withdrawal, as Barclays has been trying to make it on Wall Street since 0000.Barclays made its first foray into the business when it acquired the US brokerage arm of Lehman Brothers, after the Wall Street giant collapsed. Now, the bank is looking to cut 0,000 investment banking jobs this year, in an attempt to reduce costs and improve profit margins.Moreover, Barclays' retreat from investment banking will reduce its exposure