Massive changes in the investment banking industry over the last year have had surprisingly little effect on individual banks' share of the global fee pool, according to a report by Credit Suisse, with few firms showing noticeable gains or losses.

The findings appear in a report published this morning by Credit Suisse analysts on the investment banking industry, which compares the positions of the top banks in the equity, debt and advisory markets on October 1 with their shares four years ago.