Investing in Publicly Owned Stocks

Berkshire owns approximately 200 billion in publicly traded stocks. Why do you not tell us every year how our portfolio performed? Well, I would say it could be calculated fairly easily. It's about 40% of Berkshire's value, but 60% is the businesses. And why in the world should we want to tell a whole bunch of people to go out and buy those stocks so that we end up paying or the company ends up paying more money for them?