US STOCKS-Wall St cools as Intel, transport results disappoint
* Dow set to snap nine-day winning streak
* Southwest, Union Pacific drag down transports
* Qualcomm, Biogen surge after results
* Indexes off: Dow 0.57 pct, S&P 0.46 Pct, Nasdaq 0.39 pct (Updates to late afternoon)
By Lewis Krauskopf
July 21 (Reuters) - Wall Street cooled off on Thursday as disappointing results from tech stalwart Intel and from transportation companies stalled momentum in a U.S. corporate reporting season that has been better than feared.
The S&P 500 and Dow industrials pulled back from record highs and the Dow was set to snap a nine-session streak of gains.
Southwest Airlines fell 11.1 percent and led other airline stocks lower after the company forecast a drop in a key profitability metric. Union Pacific dropped 2.8 percent after the No. 1 U.S. railroad posted a lower quarterly net profit, hurt by slumping freight volumes.
The stocks dragged down the Dow Jones Transport index , which is often seen as a barometer of the market's health and the overall economy. Continuación...