* S&P 500 Q3 profit growth slower than Q2, Q1-Reuters data
* GE down nearly 3 pct after replacing CFO
* Viacom slips after Citi downgrades to "sell"
* Indexes: Dow up 0.02 pct, S&P off 0.07 pct, Nasdaq flat (Adds details, comments, updates prices)
By Sruthi Shankar
Oct 9 (Reuters) - Wall Street was little changed in late morning trading on Monday, as losses in healthcare stocks were offset by gains in technology shares, with the third-quarter earnings season looming.
U.S. stocks have been on a tear this year, hitting new records almost everyday in the past week, and the upcoming earnings reports will help justify the lofty valuations.
"The relatively high valuation, where the market is trading 17 to 18 times earnings, is merited by a very low interest rate environment," said Kim Forrest, senior equity research analyst at Fort Pitt Capital Group in Pittsburgh.
"We are not danger yet if you keep your eye on rates."
Overall, earnings at S&P 500 companies are expected to have increased 4.9 percent last quarter, according to Thomson Reuters data, down from the double-digit growth recorded in the first two quarters of this year.
Ten S&P 500 companies are expected to report earnings this week, including some of the biggest Wall Street banks. JPMorgan Chase and Citigroup will report on Thursday.
At 11:00 a.m. ET (1500 GMT), the Dow Jones Industrial Average was up 5.13 points, or 0.02 percent, at 22,778.8, and the Nasdaq Composite was up 0.08 points, flat on a percentage basis, at 6,590.26. Both indexes hit record intraday highs.
The S&P 500 was down 1.76 points, or 0.07 percent, at 2,547.57, which is just 5 points shy of its record high. The benchmark's eight-day winning streak came to a halt on Friday due to weak jobs numbers.
Eight of the 11 major S&P indexes were higher, led by a 0.31 percent gain in the technology sector. The healthcare index was down 0.56 percent.
GE shares sank 3 percent and was the top drag on the S&P after the conglomerate named a new CFO said it gave activist investment firm Trian Fund Management a board seat.
Medtronic dropped about 4 percent after the medical device maker said Hurricane Maria hurt second-quarter earnings and sales.
DaVita tumbled 7 percent, the most on the S&P, after JPMorgan cut its rating on the dialysis service provider, while Express Scripts fell 4.5 percent on a Raymond James downgrade.
Tesla fell 2.51 percent after pushing back the unveiling of the big rig truck to mid-November.
Viacom slipped more than 4 percent after Citigroup downgraded the stock to "sell", citing risks that pay TV firms would stop carrying its channels.
Declining issues outnumbered advancers on the NYSE by 1,453 to 1,262. On the Nasdaq, 1,481 issues fell and 1,177 advanced. (Reporting by Sruthi Shankar in Bengaluru; editing by Patrick Graham and Savio D'Souza)