weigh on

These tensions have been a key source of uncertainty for investors this week, weighing on the S&P 500 and the whole stock market—but especially Chinese names such as Alibaba.

A sharp fall in oil prices is another factor weighing on the dollar given the U.S. is a major energy producer.

Stock futures fell Friday as worries about regional bank loans weighed on sentiment and investors feared a bumpy road ahead for credit markets.

Renewed U.S.-China tensions and an unresolved U.S. government shutdown also weigh on risk sentiment.

There’s more weighing on buyers’ minds than just costs, Bob Broeksmit, the president of the Mortgage Bankers Association, said in a Thursday statement.