Buffett Reignites Berkshire Hathaway with a $4 Billion Spending Spree

Not even Warren Buffett was immune to the stock market’s rampant first-half gyrations, as Berkshire Hathaway Inc. (BRK.A, BRK.B) notched its worst first half in 18 years, with the shares skidding more than 16%. But only a fool would count out the great…