US STOCKS-Wall St ends week on down note as Apple weighs
* Healthcare, tech biggest sector losers
* Energy shares climb along with oil prices
* Looming Brexit vote in investors' cross-hairs
* Indexes down: Dow 0.33 pct, S&P 0.33 pct, Nasdaq 0.92 pct (Updates to close of U.S. market)
By Lewis Krauskopf
June 17 (Reuters) - Wall Street ended lower on Friday as Apple dragged down major indexes and investors girded for Britain's vote next week on its European Union membership.
For the week, the three indexes each posted declines of at least 1 percent, with the Nasdaq falling nearly 2 percent.
The possibility that Britain will vote to leave the EU on June 23 has been rattling global markets. U.S. stock markets could see heavy trading and increased volatility as investors position for next week's referendum.
"I don't think we're going to escape this until Thursday," said Jim Paulsen, chief investment strategist at Wells Capital Management in Minneapolis. "We're just going to be tied to those anxieties going up or down between now and the Thursday vote." Continuación...