"The price increase and the anticipated increase in the amount of shares controlled by J.P. Morgan raise the probability that the deal will be completed," S&P said in a statement. "On its own, Bear Stearns' viability is uncertain." The upgrade is a money saver for Bear because a higher rating translates to potentially lower rates for financing from lenders. - Gerald Magpily
See TheDeal.com: J.P. Morgan quintuples Bear price
See S&P press release