Among the largest underlying components of IYR, in trading today Equity Residential ( EQR) is off about 1.1%, and Vornado Realty Trust ( VNO) is lower by about 1.4%.

FORBES: Real Estate Stocks Falter Ahead of Debt Talks

The iShares Dow Jones U.S. Real Estate ( IYR) ETF is up 5.09 percent year-to-date and up half a percent in the first six trading days of the month.

FORBES: Favorite Investment Ideas Heading Into February

Among the largest underlying components of IYR, in trading today Simon Property Group Incorporated ( SPG) is up about 0.7%, and Equity Residential ( EQR) is up by about 0.3%.

FORBES: SPG, EQR Benefit From Renewed Interest in Real Estate ETF