The major market indexes closed lower on Tuesday after China unexpectedly cut several key interest rates. The August sell-off continued Tuesday, with stocks slumping across the board. Investors had to contend with a shocking move from China's central bank, as well as good-news-is-bad-news in the form of resilient U.S. consumer spending. Not all of the action was to the downside, however, with several stocks popping on news they were added to Warren Buffett's Berkshire Hathaway (BRK.B) portfolio.