Stock index futures pointed to a mixed opening on Friday, with futures for the S&P 500 down 0.02 percent, Dow Jones up 0.1 percent and Nasdaq 100 down 0.01 percent at 1008 GMT (6:08 a.m. ET).
Technology powerhouses Samsung Electronics <005930.KS> and LG Electronics <066570.KS> reinforced market optimism that strong demand recovery is in place, while cautioning that competition from global rivals is heating up.
The comments from Samsung, the world's top maker of LCD flat screens and memory chips and the No.2 mobile phone maker, come as the firm is forecast to report record profit this year, with its key businesses benefiting from an improving global economy.
Oil fell below $82 a barrel, extending the previous day's losses, as the U.S. dollar held on to gains against the euro amid worries over Greece's debt woes, and a rise in OPEC exports loomed.
Concerns over Greece's debt problems persisted on Friday. The country raised the stakes on Thursday in its quest for EU help to tackle its debt crisis, saying it cannot achieve promised deficit cuts if its borrowing costs remain so high and may have to call in the IMF.
After the bell on Thursday, SunPower Corp
There is little on the macroeconomic and corporate calendar on Friday, with no major companies reporting.
European shares rose 0.3 percent on Friday, with banks led higher by gains in Lloyds Banking Group
Asian stocks rose for a sixth straight week on Friday, their longest string of weekly gains since a global bull market began a year ago, with consumer-related shares leading the way on hopes of a steady economic recovery.
The Dow industrials rose for an eighth consecutive session on Thursday, lifted by a rise in Boeing's stock, while a mixed group of economic figures kept the broader S&P 500 in check.
The Dow Jones industrial average <.DJI> gained 0.4 percent, the Standard & Poor's 500 Index <.SPX> dipped 0.03 point and the Nasdaq Composite Index <.IXIC> gained 0.09 percent.
(Reporting by Joanne Frearson; editing by Simon Jessop)