It seems that the trend we are seeing is indicative of what is to come in terms of an emerging global super league of investment banks. If you look at hiring patterns, potential compensation/bonus payouts, government ownership, market share growth, reputation,(i.e. the weak vs. the strong) then you can single out some clear winners vs. losers currently and going forth. (For example, while some are desperately increasing base salaries to retain talent, others are getting ready for massive bonus payouts.) This is an interesting article based on an analysis fromup with the following firms as the "new kings of wall street" or the "Flow Monsters". In no particular order..
It's quite obvious however that MS would also be included in this list.