What were some of the warning signs that the US economy may not have been as strong as the stock market indicated?

Who is the author of silvery beach? Does less developed country means underdeveloped country? What are some common costs to a country that has focused? What are costs of production that affect people who have no control over how much of a good is produced? Why is economic problem with solution is not enough? What happens when OPEC reduces the production if oil? Is a cafe in the tertiary sector? How much do superconductors cost? What is postoperative services? How much does it cost to make a pair of Adidas shoes? How is the Human Development Index (HDI) determined? What type of economy do we have in the U.S.? Why in a free market system producers are motivated to reduce costs and increase revenues? What are the effects of credit crunch? What happens to a monopolistically competitive firm that begins to charge an excessive price for it's product? In what year was wyandotte mi the most bars per capita? Which of these may result in lower investment lower prices and slower economic activity? Who owns the resources in market economy? What is todays market for one ton of gold bullion? What determines the balance of production and consumption?