World stock indexes mostly fell for a second straight day Tuesday as worries about a Greek debt default continued to roil financial markets.

In the United States, stocks are mixed in midday trading. The bellwether Dow Jones Industrial Average of 30 key stocks slid eight-tenths of one percent. The broader S&P 500 is down one-tenth of a percent, while the technology-laden NASDAQ is up nine-tenths of a percent.

Stocks plummeted in Europe.

London's Financial Times index lost 2.6 percent to end at 4,944. The CAC-40 in Paris also dropped 2.6 percent to finish at 2,851. The DAX index in Frankfurt slid 3 percent , to 5,217.

In Asia, Tokyo's Nikkei index lost 1.1 percent to finish at 8,456.

Hong Kong's Hang Seng index dropped 3.4 percent to finish the day's trading at 16,250.

Gold is trading down $39.30 at $1,619 an ounce.

The dollar is higher against the yen, but down against the euro.