US STOCKS-Wall St treads lower as technology stocks weigh
* Apple drags all three indexes; Alphabet down 2.6 pct
* S&P's healthcare, IT indexes down 0.9 pct
* Indexes down: Dow 0.44 pct, S&P 0.46 pct, Nasdaq 0.87 pct (Updates to early afternoon)
By Yashaswini Swamynathan
June 17 (Reuters) - A drop in Apple dragged down all three major U.S. stock indexes on Friday afternoon even as investors remained wary of global economic growth worries and an impending referendum on Britain's European Union membership.
Britain will vote on June 23, an event that has weaved in uncertainty across the globe, battering stocks and bond yields for the past week and spiking the demand for safe-haven assets such as gold and the yen.
"Risk appetite has declined because of the Brexit vote," said Jeremy Zirin, head of investment strategy at UBS Wealth Management Americas in New York.
"Sectors that are performing well today are only those that have reacted positively to the dollar," he added.
The dollar fell 0.22 percent to 94.35 against a basket of major currencies. Continuación...