We are in a period of forced liquidation, which has happened only eight or nine times in the past 150 years. The fact that it's historic doesn't make it any more fun, of course. But it is a pretty interesting time when there is forced selling of everything with no regard for facts or fundamentals at all. Historically, the way you make money in times like these is that you find things where the fundamentals are unimpaired. The fundamentals of GM are impaired. The fundamentals of Citigroup are impaired.Virtually the only asset class I know where the fundamentals are not impaired - in fact, where they are actually improving - is commodities. Farmers cannot get a loan to buy fertilizer right now. Nobody's going to get a loan to open a zinc or a lead mine. Meanwhile, every day the supply of commodities shrinks more and more. Nobody can invest in productive capacity, even if he wants to. You're going to see gigantic shortages developing over the next few years. The inventories of food worldwide are already at the lowest levels they've been in 50 years. This may turn into the Great Depression II. But if and when we come out of this, commodities are going to lead the way, just as they did in the 1970s when everything was a disaster and commodities went through the roof.What I've been buying recently is agricultural commodities. I've also been buying more Chinese stocks. And I'm buying stocks in Taiwan for the first time in my life. It looks as if there's finally going to be peace in Taiwan after 60 years, and Taiwanese companies are going to benefit from the long-term growth of China.I have covered most of my short positions in U.S. stocks, and I'm now selling long-term U.S. government bonds short. That's the last bubble I can find in the U.S. I cannot imagine why anybody would give money to the U.S. government for 30 years for less than a 4% yield. I certainly wouldn't. There are going to be gigantic amounts of bonds coming to the market, and inflation will be coming back.In my view, U.S. stocks are still not attractive. Historically, you buy stocks when they're yielding 6% and selling at eight times earnings. You sell them when they're at 22 times earnings and yielding 2%. Right now U.S. stocks are down a lot, but they're still very expensive by that historical valuation method. The U.S. market is yielding 3% today. For stocks to go to a 6% yield without big dividend increases, the Dow will need to go below 4000. I'm not saying it will fall that far, but it could very well happen. And if it gets that low and I'm still solvent, I hope I'm smart enough to buy a lot. The key in times like these is to stay solvent so you can load up when opportunity comes.