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

In midday trading in the United States, the Dow Jones Industrial Average of 30 key stocks is down 1.4 percent. The broader S&P 500 is off 1.6 percent. The technology-laden NASDAQ is down 1.9 percent.

European markets closed sharply lower.

London’s Financial Times 100 index ended down one percent to finish at 5,076. The CAC-40 in Paris slid 1.9 percent to end at 2,927. The DAX in Frankfurt finished off 2.3 percent , at 5,377.

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 $33.63 at $1,657.60 an ounce.

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