U.S. 30-year Treasury yields fell to a record low below 2% and benchmark 10-year notes dropped to a three-year trough on Thursday amid persistent worries about global trade tensions and economic slowdowns around the world.Yields on U.S. two-year notes also declined, sliding to a nearly two-year low. A day after inverting, the U.S. yield curve steepened a little. Curve inversion, which occurs when long-term yields dip below short-term ones, is widely considered a warning that the economy is headed for recession. U.S. yields fell further in mid-afternoon trading. Some analysts said the latest slide was due to a report ... (full story)