* Apple shares fall the most since Brexit vote result
* ECB leaves monetary policy unchanged
* Indexes down: Dow 0.3 pct, S&P 0.2 pct, Nasdaq 0.5 pct (Updates to close)
By Caroline Valetkevitch
Sept 8 (Reuters) - U.S. stocks dipped on Thursday, dragged down by Apple after its iPhone 7 failed to impress Wall Street, but gains in energy shares limited the decline.
The Nasdaq broke a four-day streak of gains after Apple fell 2.6 percent to $105.52, its biggest daily percentage decline since June 24, when Britain's vote to leave the European Union unleashed a massive selloff.
The company also said it would not release first-weekend sales of the new iPhone, limiting analysts' early visibility into the popularity of the product unveiled Wednesday.
The S&P 500 information technology index fell 0.9 percent and led sector losses, while the S&P energy index was up 1.7 percent following sharp gains in oil prices.
U.S. stocks have been trading in a tight range in recent months as investors try to assess the outlook for U.S. interest rates and the health of the U.S. economy.
"People are wondering when and if the Fed is going to move again," said John Carey, portfolio manager at Pioneer Investment Management in Boston.
"There's anxiety about that because of what happened the last time. Even though they raised rates just a quarter of a percent, that seemed enough to trigger a sale of stocks. There's worry there could be a similar reaction."
Recent weak economic data has underscored views the Federal Reserve may hold off on raising rates at its policy meeting this month. The European Central Bank held interest rates steady, as expected, on Thursday.
The Dow Jones industrial average was down 46.23 points, or 0.25 percent, to 18,479.91, the S&P 500 lost 4.86 points, or 0.22 percent, to 2,181.3 and the Nasdaq Composite dropped 24.44 points, or 0.46 percent, to 5,259.48.
Hewlett-Packard Enterprise shares fell 3.2 percent after it agreed to sell its software business to Micro Focus in a $8.8 billion deal.
About 6.8 billion shares changed hands on U.S. exchanges, above the 6.0 billion daily average for the past 20 trading days, according to Thomson Reuters data.
Declining issues outnumbered advancing ones on the NYSE by a 1.20-to-1 ratio; on Nasdaq, a 1.03-to-1 ratio favored decliners.
The S&P 500 posted 13 new 52-week highs and 2 new lows; the Nasdaq Composite recorded 109 new highs and 29 new lows. (Additional reporting by Yashaswini Swamynathan and Tanya Agrawal in Bengaluru; Editing by Anil D'Silva and Nick Zieminski)