In 2001, stock prices took a sharp downturn (some say "stock market crash" or "the Internet bubble bursting") in stock markets across the United States, Canada, Asia, and Europe. After recovering from lows reached following the September 11 attacks, indices slid steadily starting in March 2002, with dramatic declines in July and September leading to lows last reached in 1997 and 1998. The U.S. dollar increased in value relative to the euro, reaching a 1-to-1 valuation not seen since the euro's introduction.