US STOCKS-S&P 500, Dow dip as DuPont warns; Nasdaq edges up
* DuPont drops as outlook cut
* Russell reconstitution may drive up volume at close
* Consumer sentiment rises in June - U Mich
* Indexes: Dow off 0.2 pct, S&P down 0.1 pct, Nasdaq up 0.2 pct (Updates to afternoon trading, changes byline)
By Caroline Valetkevitch
NEW YORK, June 27 (Reuters) - The Dow and S&P 500 edged lower on Friday following a downbeat second-quarter forecast from DuPont, though consumer sentiment data helped support the market.
DuPont shares lost 4 percent to $65 and were among the biggest negative influences for the Dow and S&P 500, a day after it cut its operating profit forecast for the quarter and full year, mainly due to a worse-than-expected performance at its agriculture and performance chemicals units.
It was among the latest companies to warn on the quarter, with the ratio of negative to positive outlooks at 4.2 to 1, higher than the long-term average of 2.6 to 1, Thomson Reuters data showed.
"I think what we're in the midst of is a mini correction in which prices have finally achieved a certain valuation level that has become increasingly uncomfortable for market participants in the absence of further decisive evidence that the economy is on the right track," said Mark Luschini, chief investment strategist at Janney Montgomery Scott in Philadelphia. Continuación...