Why this popular Treasury-bond ETF is trading at its lowest since 2004

The prolonged selloff in U.S. government bonds has pushed one of the most heavily-traded Treasury ETFs to its lowest price since 2004. This decline reflects a sustained rise in long-term yields, which move inversely to bond prices. For those using ETFs to gauge the broad Treasury market, the move underscores how sharply the fixed-income landscape has shifted as expectations for interest rates and inflation have been reset over the past several years.

While Treasury securities are seen as low-risk assets, they are not immune to price volatility. A decline of this magnitude carries significant market relevance because long-dated yields serve as a benchmark for mortgage rates, corporate borrowing, and the "risk-free" discount rate used to value equities and other financial instruments. When long-term yields rise, the carrying cost of debt increases for both governments and businesses, and equity multiples come under pressure as future earnings are discounted more heavily.

The key question now is what drives yields further. Investors will watch inflation data, the pace of Treasury issuance, and any signals from the Federal Reserve on the path of policy. Because long-duration assets are especially sensitive to shifts in these forces, any change in the outlook for growth or inflation could determine whether this multi-decade low represents a turning point or further pressure.