S&P downgraded Berkshire Hathaway (BRK.A -3.1%) from AAA to AA+, saying its acquisition of...

|By:, SA News Editor

S&P downgraded Berkshire Hathaway (BRK.A -3.1%) from AAA to AA+, saying its acquisition of Burlington Northern Santa Fe (BNI) will hurt liquidity. The downgrade came on the same day the company announced an $8 billion bond sale to help finance the acquisition.