US STOCKS-U.S. futures slip as Greece continues to weigh
* Futures down: Dow 49 pts, S&P 7 pts, Nasdaq 18 pts
By Tanya Agrawal
June 12 (Reuters) - U.S. stock index futures were lower on Friday, after closing up for the second straight day, as optimism regarding a resolution of the Greek debt crisis faded.
* U.S. stocks climbed on Thursday as retail sales data lifted the outlook for consumer spending and as healthcare shares gained.
* The International Monetary Fund dramatically raised the stakes in Greece's stalled debt talks late on Thursday, announcing that its delegation had left negotiations in Brussels and flown home because of "major differences" with Athens.
* The Producer Price Index for May is expected to have increased 0.4 percent for the month, compared with the 0.4 percent decline in April. The data is expected at 8:30 a.m. ET (1230 GMT).
* The University of Michigan's preliminary June reading on the overall index on consumer sentiment is expected to have risen to 91.5 from 90.7. That data is expected at 10:00 a.m. ET.
* The Fed has said it will raise rates only when it sees a rebound in the economy, which came to a standstill in the first quarter.
* Economists and top Wall Street banks expect the Fed to raise rates in September, in what could be the central bank's first hike in almost a decade and turn the direction of the flow of easy money that has driven world stocks and bond prices to record highs in recent years. Continuación...