By Gertrude Chavez-Dreyfuss NEW YORK (Reuters) -Investors are cautiously approaching the U.S. Treasury's sale of $22 billion in 30-year bonds on Thursday after an underwhelming auction last month that had some of the weakest demand metrics of 2025, though some believe it could be different this time. The auction size is$3 billion smaller than that in August and could be easier to absorb, which could be an advantage, analysts said. However, the 30-year bond sale comes amid global disdain for the long en ...