News Snapshot:
NEW YORK, Aug 24 (Reuters) - Recent shifts in the U.S. Treasury yield curve may indicate that market optimism around the economy could wane, with some investors looking at Federal Reserve Chair Jerome Powell's speech at an economic symposium on Friday as a potential trigger for a correction or rapid unwind in positions. The yield curve comparing two-year with 10-year yields has been inverted on a continued basis for over a year, a reliable sign of a looming recession, but it has steepened in recent weeks because 10-year yields have been rising while shorter-dated ones have remained flat. The so-called...