Swiss bank Credit Suisse could announce the loss of up to 5,000 jobs in its investment banking business at its forthcoming Q1 of 2012 results, a Swiss newspaper reports.  The reported number is an estimate that the story cites as coming from a member of senior management.  The individual further added that the investment bank is "simply completely oversized." Q1 results are scheduled to be released on Wednesday, 4/25. Credit Suisse ended 2011 with 20,900 investment bankers, 200 more than at the beginning of the year.  Staff count at the whole bank was largely stable even after 2 rounds of cuts eliminated 7% of the bank's overall workforce, or 3,500 jobs. The Zurich-based bank has faced increased shareholder criticism about the size and the cost of its investment bank, raising pressure on CEO Brady Dougan for cutbacks.  A spokeswoman for the bank did not want to comment or confirm the report. [Reuters, 4/16/12]