The S&P 500 is up nearly 17% year-to-date, and the Nasdaq composite index is up more than 30%. Americans continue to spend money, unemployment is low, the Federal Reserve may soon put its painful interest rate hike on hold as inflation is steadily, albeit slowly, declining. But documents from the Securities and Exchange Commission released Monday showed that Warren Buffett's Berkshire Hathaway (BRKA) sold nearly $8 billion more shares than it bought in the second quarter of 2023. That's not much by his standards, but a significant step up when the market...