Warren Buffett's successor starts spending Berkshire's cash mountain

Greg Abel boosted spending on stocks and buybacks in the second quarter. AP Photo/Rebecca S. Gratz Greg Abel made a dent in Berkshire Hathaway's cash pile last quarter. Berkshire's heaviest spending on stocks and buybacks in years shrank its cash pile to $365 billion. Warren Buffett grew Berkshire's cash to record highs as bargain stocks and acquisitions were scarce. Greg Abel might just be a little looser with the purse strings than Warren Buffett. Abel, who succeeded Buffett as Berkshire…