A selloff in Apple (AAPL)  and ever-present concerns over next week's "Brexit" vote kept Wall Street in the red Friday.

The S&P 500 and Dow Jones Industrial Average both fell 0.33%.

Apple pressured the Nasdaq after the tech giant was ordered to stop sales of its iPhone 6 and 6 Plus smartphones in Beijing, citing patent infringement. Apple says the order has been put on hold while it appeals and continues to sell all phones. Shares remained down 2.28%.

Apple is a holding in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells AAPL? Learn more now.

The Nasdaq closed down 0.92%. The tech sector was the worst performer Friday with major tech companies such as Amazon (AMZN) , Microsoft (MSFT)  and Alibaba (BABA) all lower. The Technology Select Sector SPDR ETF (XLK) fell 0.67%.

Investors remained cautious ahead of next week's referendum to determine whether Great Britain will remain in the European Union. U.K. citizens will head to the polls on June 23. An exit would have far-reaching economic and political consequences. 

The Federal Reserve's rate hike plans remained in the spotlight Friday after St. Louis Fed President James Bullard said a slower, more stable economy warrants fewer rate hikes. Bullard noted that low economic growth and a Fed funds rate of just 63 basis points are likely to remain through to 2018. He expects growth of just 2%, weak inflation and a low unemployment rate to continue.

If you liked this article you might like

How to Make Your Life Successful Just Like Billionaire Warren Buffett

AI Pioneer Andrew Ng: There's Room for Multiple Winners in the AI Race

Watch Out For the Dominoes That Fall: Cramer's 'Mad Money' Recap (Wed 9/20/17)

These Are the Top 50 Jobs in the U.S. Right Now

Driving This Beastly Cadillac CTS Reminded Me That Sexism Is Alive and Well