US STOCKS-Wall St lower after CPI data; Yellen speech awaited
* Core inflation at highest since January 2013
* Yellen speaks at 1:00 p.m.
* HP rises on low forecast for split-related costs
* Ctrip up on deal to buy stake in China travel firm
* Indexes down: Dow 0.03 pct, S&P 0.01 pct, Nasdaq 0.1 pct (Adds details, changes comment and updates prices)
By Tanya Agrawal
May 22 (Reuters) - U.S. stocks fell in late morning trading on Friday, retreating from recent record highs, as investors await Federal Reserve Chair Janet Yellen's economic outlook for clues on the timing of a rate hike after new data showed a rise in inflation.
Yellen is expected to highlight the economy's steady job growth, while April's consumer price index data is likely to bolster Fed's case for its first policy tightening in nearly a decade. Yellen's speech will start at 1:00 p.m. ET (1700 GMT).
Consumer prices moderated last month, data showed, but the so-called core consumer price index, which strips out food and energy costs, posted its largest gain since January 2013. Continuación...