By Davide Barbuscia NEW YORK (Reuters) – Vanguard, the world’s second-largest asset manager, believes U.S. Treasuries are near the end of a painful decline even as prices tumble to fresh multi-year lows, a senior portfolio manager at the firm told Reuters. Benchmark U.S. Treasury 10-year yields, which move inversely to prices, on Monday hit their highest level since 2011, continuing a trend that has put bonds in the midst of their worst year ever as the Federal Reserve rolls out massive rate hikes to fight surging inflation. Markets broadly expect the central bank to raise rates by another 75 …