U.S. bonds traded higher on Monday, as ongoing turmoil in Ukraine boosted investors' bid for "safe haven assets".
Monday will kick off a busy week for data on Wall Street, with the latest manufacturing ISM index due at 10 a.m. ET.
Severe U.K. winter floods and storms will cost insurers around £1.2 billion ($2.0 billion), but the hit to the sector's earnings could be "limited".
U.S. stock index futures pointed to a lower open on Friday, ahead of the official second estimate of fourth quarter 2013 economic growth.
U.S. stock index futures signaled a lower start to Wall Street trade on Thursday, ahead of monthly durable goods data.
U.S. stock index futures pushed higher on Wednesday ahead of more housing data and several quarterly fourth quarter earnings updates.