* Futures up: Dow 11 pts, S&P 2 pts, Nasdaq 4.25 pts
By Yashaswini Swamynathan
Aug 24 (Reuters) - U.S. stock index futures were flat on Wednesday as investors keep up their wait for Federal Reserve Chair Janet Yellen's speech on Friday for clues on the timing of a rate hike.
* Yellen's keynote speech will be the main focus of a meeting of global central bankers in Jackson Hole, Wyoming. The meet, which starts Thursday, has traditionally been used by Fed chiefs as a platform to signal the direction of monetary policy.
* Recent hawkish comments from some Fed policymakers, including Vice Chairman Stanley Fischer, have raised expectations that Yellen might signal the possibility of a hike in September.
* Wall Street has been on a record-setting run due to continued expectations for low rates, coupled with upbeat corporate earnings and strong economic data.
* Wall Street closed higher on Tuesday, with the Nasdaq hitting a record intraday high, supported by robust housing market data and gains in technology stocks.
* A report on U.S. existing home sales by the National Association of Realtors is likely to show resales fell 0.4 percent in July. The data is due at 10:00 a.m. ET (1400 GMT).
* Shares of Express Inc plunged 19 percent in premarket trading after the apparel maker slashed its full-year earnings outlook.
* Intuit fell 4.9 percent after the tax-preparation software maker gave a dismal profit and revenue forecast for the current quarter.
Futures snapshot at 7:01 a.m. ET:
* Dow e-minis were up 11 points, or 0.06 percent, with 18,208 contracts changing hands.
* S&P 500 e-minis were up 2 points, or 0.09 percent, with 125,577 contracts traded.
* Nasdaq 100 e-minis were up 4.25 points, or 0.09 percent, on volume of 17,798 contracts. (Reporting by Yashaswini Swamynathan in Bengaluru; Editing by Savio D'Souza)