Global stock markets cautious amid Greek debt talks

U.S. stocks are opening lower as negotiations between Greece and its lenders drag on.

Greece faces a deadline next week for a big loan repayment, and could default if it can't agree with its creditors on what reforms it needs to make.

The Dow Jones industrial average fell 67 points, or 0.4 percent, to 18,076 as of 9:35 a.m. Eastern time Wednesday.

The Standard & Poor's 500 index gave up three points, or 0.2 percent, to 2,120.

The Nasdaq composite decreased 10 points, or 0.2 percent, to 5,150.

Homebuilder Lennar jumped 7 percent after reporting earnings that easily beat the estimates of Wall Street analysts.

Bond prices rose. The yield on the 10-year Treasury note fell to 2.39 percent.