By Chuck Mikolajczak
NEW YORK (Reuters) - U.S. stock index futures were up slightly on Thursday, after a three-day drop by the S&P 500 as oil prices advanced and ahead of a flurry of economic data.
* The benchmark S&P index <.SPX> dropped more than 1 percent on Wednesday and has shed 2.4 percent over the past three sessions, it's worst run in two months, as weakness in oil prices has weighed heavily on the energy <.SPNY> sector.
* Falling oil prices have added to worries about global demand and raised concerns about earnings for energy companies, with year-end tax selling putting additional pressure on the group. The sector is down 14.7 percent for the year and is the worst performing of the 10 major S&P sectors.
* Brent crude
* Investors await a trio of economic data reports at 8:30 a.m. EST, including weekly initial jobless claims data, November retail sales and import prices for November. Initial claims are expected to show a reading of 295,000 while retail sales are expected to rise by 0.4 percent. Import prices are forecast to decline by 1.8 percent.
* The data may influence investors' expectations on whether the Fed will adjust its language to keep interest rates near zero for a "considerable time" when policymakers meet next week.
* Later in the session at 10:00 a.m., business inventories data for October is expected.
* U.S.-listed shares of Teva Pharmaceutical
* Lululemon Athletica
* Staples Inc
* European shares edged lower, as the slump in oil and iron ore prices weighed on a number of resource-related stocks, but declines were curbed by expectations for further monetary stimulus from the European Central Bank. In Asia, stocks fell as falling oil prices added to global growth concerns. [.EU]
Futures snapshot at 7:26 a.m. EST:
* S&P 500 e-minis
* Nasdaq 100 e-minis
* Dow e-minis <1YMc1> were up 21 points, or 0.12 percent, with 36,481 contracts changing hands.
(Editing by Bernadette Baum)