Group 1 - Precision Castparts manufactures castings, forgings, and fasteners for aerospace, industrial, and automotive markets [1] - At one point, General Electric accounted for 11% of Precision's revenue [1] - The stock was bought correctly at around 40, with the first sell based on the rule to sell when a stock closes for the week below a certain threshold [1] Group 2 - Warren Buffett's cash infusion will allow OXY to reward him with stock buybacks [2] - The Dow Jones futures rose on Warren Buffett's investments, particularly in Nucor and UnitedHealth [4] - Berkshire Hathaway's Q2 operating profit fell by 4% [4]