US STOCKS-Wall St rebounds as investors buy beaten-down shares
* Gilead leads as biotechs end 5-day losing streak
* Railcar makers gain on new tough oil-train safety rules
* Social media stocks fall with LinkedIn
* Consumer sentiment, auto sales rise
* Indexes up: Dow 0.95 pct, S&P 0.98 pct, Nasdaq 1.15 pct (Updates to late afternoon)
By Caroline Valetkevitch
May 1 (Reuters) - U.S. stocks bounced back sharply on Friday as investors snapped up some of this week's most beaten-down shares, including in the healthcare and technology sectors, and as data pointed to a pickup in economic activity.
Apple gave the three major indexes their biggest boost, with a 2.3 percent increase to $128.01, reversing Thursday's decline. The S&P tech sector was up 1.2 percent, while the Nasdaq was on track to snap a four-day losing streak.
Biotech shares also rebounded and were set to snap a five-day losing streak. The Nasdaq Biotech Index was up 2.7 percent. Continuación...