Defenders of the free market faith tell us that price conveys a great deal of information, enough that you can base an entire economic system on it without any central planning or coordination whatsoever. Whether extreme devotion to this principle is wise may not be so important to determine this week as whether free market prices are actually available in many markets. Recent events surrounding the precipitous decline of the Chinese stock market are illustrative of this problem, but I'll come back to this a little later.
Years of suppressing the cost of credit through central-bank imposed near zero interest rates has led to the mispricing of anything that depends on credit. The list is long and includes real estate because mortgages are central to its purchase; oil because cheap bank loans and low bond rates financed otherwise uneconomic deposits of tight oil from deep shale deposits in the United States; natural gas in the United States for similar reasons; stocks and bonds because large investors often borrow to buy them; and cheap Chinese consumer goods made more and more available by cheap finance to build the factories that produce them.
The effect is not uniform, that is, cheap credit tends to make some things go up by stimulating demand for them such as real estate, stocks and bonds--while making some things go down such as the price of oil and natural gas because U.S. drillers got cheap financing which encouraged overproduction.