US STOCKS-Wall Street ends stronger as global debt worries fade
* Jobless claims stay near 15-year low
* Alibaba jumps on better-than-expected revenue
* Yelp jumps on report it is exploring sale
* CBS gains in extended trade after quarterly results
* Dow gains 0.45 pct, S&P 500 up 0.38 pct, Nasdaq up 0.53 pct (Updates to close)
By Noel Randewich
May 7 (Reuters) - U.S. stocks ended higher on Thursday, helped by a jump in tech stocks and a reversal in surging global interest rates.
Strong quarterly results from Alibaba as well as speculation that consumer review website Yelp.com could be for sale drove technology stocks higher, with the S&P tech index up 0.87 percent.
The number of Americans filing new claims for unemployment benefits held near a 15-year low last week, suggesting positive momentum in the economy, but not so much as to change expectations for a September interest rate hike by the Federal Reserve. Continuación...