U.S. stock index futures signaled a lower open on Monday, set to follow European markets into negative territory as negotiations over Greece's bailout program continue to keep investors cautious.
Shares on the Athens Stock Exchange tumbled around 5 percent on Monday, as Greek Prime Minister Alexis Tsipras said his election pledge to end austerity by restructuring Greece's debt was "irrevocable" in his inaugural speech in parliament late Sunday.
Greek bonds sold off following the speech, with the short-end of the market hit hardest. Greek two-year bonds soared to yield 20.7 percent, while five-year and 10-year yields climbed to trade around 16 percent and 11 percent respectively.
Last week's strong jobs report has also made investors jittery as the improvements in the labor market could increase potential for an early interest rate hike from the U.S. Federal Reserve.
The coming week should be a less eventful one for economic data, with no major releases due Monday. Major data expected later in the week includes January's retail sales figures, due on Thursday.
Hasbro reported quarterly earnings of an adjusted $1.22 per share, beating estimates by one cent, with revenue slightly below forecasts. Hasbro said foreign exchange hurt fourth quarter revenue by more than $75 million dollars. Separately, Hasbro raised its quarterly dividend to 46 cents per share from 43 cents.
Masco earned an adjusted 24 cents per share for its latest quarter, four cents above estimates, with revenue slightly below Street forecasts. The maker of building products said it is benefiting from cost controls and better productivity.
CNA Financial, Lowes's largest subsidiary, reported a 10 percent fall in profit due to lower net written premiums.
CNBC's Peter Schacknow contributed to this report.