World stock markets fell Monday on new worries of a Greek debt default.

In early trading in the United States, both the Dow Jones Industrial Average and the S&P 500 indexes are off five-tenths of one percent. The NASDAQ is down seven-tenths of a percent.

European markets plunged in afternoon trading.

London's Financial Times 100 index is down 1.9 percent. The CAC-40 in Paris is off 2.4 percent and the DAX in Frankfurt is down 2.8 percent.

In Asia, Tokyo's Nikkei index lost one and three-quarters percent to finish at 8,545.

Hong Kong's Hang Seng index lost 4.4 percent after being closed Friday because of a typhoon, and closed at 16,822.

Gold was trading up $31.45 at $1,655.43 an ounce.

The U.S. dollar was down against the yen, but up against the euro.