GLOBAL MARKETS-Benchmark indexes up; renewed doubt on end of Fed purchases

* U.S. stocks little changed after new home sales data * U.S. dollar index gives up gains * Treasuries prices rise on disappointing U.S. home sales NEW YORK, Aug 23 (Reuters) - Benchmark stock indexes around the world edged higher, although the dollar fell on Friday after a U.S. government report showed sales of new single-family homes in July fell to their lowest level in nine months, raising doubts about the timing and extent of cuts to the Federal Reserve's stimulus program. .