US STOCKS-Wall St little changed after Yellen comments
* Yellen says Fed should be cautious in rate hike decision
* Russia aid convoy crossed border without OK, Ukraine says
* Indexes: Dow off 0.09 pct, S&P off 0.13 pct, Nasdaq up 0.11 pct (Updates to market open, adds quote)
By Chuck Mikolajczak
NEW YORK, Aug 22 (Reuters) - U.S. stocks were little changed on Friday, in the wake of comments from Federal Reserve Chair Janet Yellen.
Stocks showed muted reaction to comments from the Fed chair who, in a speech at a central banking conference in Jackson Hole, Wyoming, said U.S. labor markets remain hampered by the effects of the Great Recession and that the Federal Reserve should move cautiously in determining when interest rates should rise.
"The reaction was a few weeks ago when the GDP number came out," said Michael Marrale, head of research, sales and trading at ITG in New York.
"At that point I thought you'd have some who step up and would want to sell the news in anticipation of a rate hike coming sooner than expected at that time, so I think people have already positioned for that."
Investors will also monitor the situation in Ukraine after authorities there said trucks from a Russian aid convoy had crossed into Ukraine without permission, a move it described as a "direct invasion" of its territory. Continuación...