* U.S. stock index futures pointed to a lower open on Wall Street on Friday, as investors turned cautious after oil major Chevron Corp
* At 0910 GMT, futures for the S&P 500 were down 0.4 percent, Dow Jones futures were down 0.3 percent and Nasdaq 100 futures were down 0.3 percent.
* After the bell on Thursday, Chevron warned that second-quarter earnings would be hit by a sharp decline in U.S. refining margins and that any benefits from higher oil prices were largely offset by a weaker dollar, sending its shares down 1.8 percent.
* Chevron's stock traded in Frankfurt
* Oil resumed its fall toward $60 on Friday and looks set to end the week down about 8 percent, its largest weekly fall since late January, on deepening economic pessimism and fears of new rules to curb futures speculation.
* The dollar rose broadly and the yen hovered near the week's peaks against other major currencies on Friday on investor caution as U.S. corporate earnings season got rolling and as share prices fell.
* On the macro front, Japanese wholesale prices fell a record 6.6 percent in the year to June, as the world's No.2 economy slides deeper into deflation, reinforcing the view that the Bank of Japan will keep its corporate funding support measures in place beyond September.
* The battered auto sector will be in focus after Nissan Motor Co's <7201.T> CEO Carlos Ghosn said he expects 2010 to be as difficult as 2009 as the crisis in the worldwide auto industry continues. Ghosn, who is also CEO of Renault
* General Motors
* European stocks were slightly down in morning trade, as energy shares such as Total
* Investors will keep an eye on the preliminary reading for July's Reuters/University of Michigan survey of consumer sentiment, due at 1355 GMT. The data is expected to come in at 70.5, down from 70.8 in June, according to the average forecast of 60 economists polled by Reuters.
* U.S. stocks inched higher on Thursday as investors bought recently-hammered technology and commodity shares, while an upbeat broker comment on Goldman Sachs lifted the financial sector.
* The Dow Jones industrial average <.DJI> gained 4.76 points, or 0.06 percent, to 8,183.17. The Standard & Poor's 500 Index <.SPX> added 3.12 points, or 0.35 percent, to 882.68. The Nasdaq Composite Index <.IXIC> rose 5.38 points, or 0.31 percent, to 1,752.55.
* Both the Dow and the S&P are on track to record their fourth consecutive week of losses.
(Reporting by Blaise Robinson; Editing by Hans Peters)