US STOCKS-Nasdaq ends up 9th session; S&P 500, Dow dip with energy
* Existing home sales hit 9-month low
* Goldman cuts Boeing to sell rating
* Valeant, Salix agree to merger
* Dow down 0.1 pct, S&P down 0.03 pct, Nasdaq up 0.1 pct (Updates to close)
By Caroline Valetkevitch
NEW YORK, Feb 23 (Reuters) - The Nasdaq ended higher on Monday for a ninth straight day following gains in Apple , while the Dow and S&P 500 eased off recent record highs as lower oil prices dragged down energy shares.
Nasdaq's winning run was its longest since September 2010, putting the index closer to its 5,132.52 all-time intraday high, reached in March 2000 just before the dot-com bubble burst. Giving Nasdaq its biggest boost were shares of Apple, which rose 2.7 percent to $133.00, another record close.
Oil prices fell, with WTI crude off 2.7 percent at $49.45 a barrel on oversupply concerns and a stronger dollar, pushing the S&P energy index down 0.4 percent.
The PHLX housing sector index was off 0.5 percent after existing home sales fell to their lowest in nine months in January. Continuación...