Do you have your savings in a mutual fund? Does your pension fund invest in stocks, just as mutual funds do? If so, you may want to know this has been a bad week for U.S. stock markets. The Dow and Nasdaq indices have plummeted big time, but not because of the U.S. economy which is showing signs of revival. It is, as the Wall Street Journal reports, mostly because of the woes in China plus the shakiness of the depressed Greek economy and weaknesses of the economies in other larger emerging nations such as Brazil and Turkey.