On Tuesday, the stock market fell due to a surprise announcement made by the Greek Prime Minister. He has called a referendum on last week's new bailout package. If the Greek population votes against the EU's financial package, the country could face bankruptcy. The Dow Jones Industrial average has been down over 300 points, and this decision caused U.S. markets to spiral downward. The U.S. dollar and U.S. government bonds rose as traders moved their assets to their safest locations.

The Dow Jones Industrial average, sometimes called The Dow Jones or simply The Dow, was created in 1896 by Charles Dow and his business associate, Edward Jones. The index shows how thirty large, publicly owned, U.S. based companies traded in the stock market during a standard trading session. It is one of several indices that track stock market activity.