Buffett is retiring, this is the real big news.

His portfolio of Berkshire Hathaway stocks is valued at $313 billion, with 46 stocks. But that's not the main point—the main point is that he also holds $344.1 billion in cash, which is more than the entire stock portfolio.

Apple accounts for 24.2% ($75.9 billion), American Express 17.4% ($54.6 billion), and Bank of America 10.3% ($32.2 billion). A solid concentrated investment— the top ten holdings make up 82.1%. Coca-Cola and American Express, held for decades, continue to pay dividends.

What's most interesting is: why is he hoarding so much cash? There are people in the market questioning — this accumulation of cash over the past few years may become a classic reflective topic in investment history when we look back. Even Amazon hasn't fully gotten on board (only $2.2 billion).

The troubles of the rich are truly beyond the understanding of us ordinary retail investors. But one thing is certain: what is he waiting for?