* Pfizer dips as results roughly in line
* Dollar advances, drags commodities
* Futures off: Dow 51 pts, S&P 6.7 pts, Nasdaq 9.75 pts
* For up-to-the-minute market news see STXNEWS/US (Adds quote, updates prices)
By Chuck Mikolajczak
NEW YORK, May 3 (Reuters) - U.S. stock index futures fell on Tuesday as strength in the dollar pressured commodity prices and investors eyed a possible pullback in equity prices after a recent run-up.
The dollar hobbled near a three-year trough against a currency basket, undermined by loose U.S. monetary policy. But analysts said the fall looked overextended due to extreme short positioning. For details, see [ID:nLDE7420UV]
The dollar index <.DXY>, measured against a basket of major currencies, was last up 0.4 percent.
Shares of mining company Freeport McMoRan Copper & Gold
Inc
Brent crude
"Basically, the dollar is a little bit higher, so that is weighing on risk this morning," said Peter Cardillo, chief market economist at Avalon Partners in New York.
"Now we are seeing a little bit of divergence. We are beginning to see perhaps a little bit of a pullback in commodity prices and a dollar that might be in for a short-term bounce, so that cuts into risk."
S&P 500 futures
The benchmark S&P 500 has risen 4.3 percent since April 18, when it hovered near the technical support level of 1,300.
Pfizer Inc
Other companies expected to post earnings include Comcast
Corp
At 10 a.m. EST [1400 GMT], the Commerce Department releases March factory orders. Economists in a Reuters survey expected a 1.9 percent rise, compared with a 0.1 percent drop in February.
European shares fell nearly 1 percent at midday as investors locked in profits following an eight-session winning streak for a key index, with declines in automakers and heavyweight miners weighing on the market. Asian shares were also dragged down by miners. [.EU] [ID:nL3E7G30CR]
U.S. stocks slipped Monday as an early bounce from Osama bin Laden's death gave way to questions about the longevity of the market's recent rally. (Reporting by Chuck Mikolajczak; editing by Jeffrey Benkoe)