The U.S. dollar finished mixed Friday in a world market traders said was influenced by myriad factors, from uncertainty in federal budget negotiations to falling oil prices.

In New York, one British pound fetched $1.9675, less expensive than $1.9775 late Thursday. But in London, the pound rose to $1.9740 from $1.9640 late Thursday."This is just a very volatile market," said Lloyd G. Atkinson, chief economist with the Bank of Montreal. "There's not much to make out of trends. It's just a very, very nervous market."