The stock markets ended one of the worst months in three years by starting September in a nose dive.

The Dow Jones Industrial Average fell almost 470 points and ended at 16,058.  The drop of just over 2.8% was the single worst opening day for a month in the market since March 2009.  The Dow has fallen 12.5% from the all-time high in May.

The Standard & Poor’s 500 also had their worst first day of trading since March 2009, falling almost 3 percent to 1,913.  Only three stocks in the index showed gains on the day:  Cablevision, American Airlines and a chemical company, Sigma-Aldrich.

The NASDAQ had its worst opening day of a month trading since October 2011.  It’s now 2% lower for the year.

Most analysts attributed the stock fall to continuing fears about the Chinese economy and volatility in the Chinese stock market.  Two major reports from China today showed significant slowing in the country’s manufacturing.

Many of the American stocks that took heavy hits in today’s trading have strong connections to China such as Apple and Qualcomm.

However, the U.S. gauge for manufacturing also turned in a dismal result Tuesday.  The ISM manufacturing index fell to its lowest level since May 2013.