Most long-term interest rates, however, have barely budged despite the appreciable reductions in short-term rates since the beginning of the year. This has led many commentators to ask whether inflation expectations have risen. Surely, one reason long-term rates have held up is changed expectations in the Treasury market, as forecasts of the unified budget surplus were revised down, indicating that the supplies of outstanding marketable Treasury debt are unlikely to shrink as rapidly as previously anticipated. Beyond that, it is difficult to judge whether long-term rates have held up because of firming inflation expectations or a belief that economic growth is likely to strengthen, spurring a rise in real long-term rates.