US STOCKS-S&P, Dow gain on surge in oil prices
* Technology, healthcare stocks drag Nasdaq
* Crude jumps 6 pct
* Gap sinks after poor March same-store sales
* Dow up 0.24 pct, S&P up 0.31 pct, Nasdaq down 0.14 pct (Adds details, changes shares)
By Yashaswini Swamynathan and Abhiram Nandakumar
April 8 (Reuters) - A sharp rally in crude oil drove gains on the S&P 500 and the Dow on Friday, but a fall in healthcare and technology stocks pushed the Nasdaq into negative territory.
Oil prices jumped more than 6 percent after data showed drawdowns in U.S. stockpiles, suggesting underlying strength in the economy as demand for energy picks up.
Fed Chair Janet Yellen said on Thursday that the U.S. economy was on "a solid course," while New York Fed President William Dudley said on Friday a cautious and gradual approach to raising rates was appropriate.
"The market's been directionless all week and there hasn't been any clear trend to speak of," said Neil Massa, senior trader at John Hancock Asset Management in Boston. Continuación...