US STOCKS-Energy gains boost Wall St; S&P on track for weekly loss
* Technology, healthcare stocks drag Nasdaq
* Crude jumps 6 pct
* Gap sinks after poor March same-store sales
* Dow up 0.2 pct, S&P up 0.3 pct, Nasdaq up 0.03 pct (Updates to late afternoon)
By Caroline Valetkevitch
April 8 (Reuters) - A sharp rally in crude oil and energy shares kept U.S. stocks in positive territory on Friday, but indexes were on track to post losses for the week and a drop in shares of biotechs kept a lid on the Nasdaq.
The Nasdaq Biotech index down 1.4 percent on the day.
Investors were cautious ahead of earnings, which begin in earnest next week with reports from Alcoa and four of the big banks.
The S&P 500 is down 1.1 percent for the week so far, which would be its biggest weekly decline since early February. The index has mostly rallied since mid-February along with oil prices and as worries over China eased. Continuación...