Shares of VanEck's Ethereum ETF surged to $32.80, up 6.8%, after the U.S. Treasury surprised markets by at least doubling long-term bond buyback limits — a move that hammered yields and sent risk assets, including Ethereum, sharply higher. For ETHV holders, whose fund is essentially a pure bet on the price of Ether, the rally was a direct gift from Washington's bond desk. The question is whether it lasts.

• The Treasury Is Stepping In as a Bigger Buyer of Its Own Debt

The Treasury increased the maximum size of its buyback operations for longer-dated bonds from $2 billion to at least $4 billion per operation , covering the 10-to-20-year and 20-to-30-year sectors effective September 9 through November 4.

The 30-year bond yield fell 9 basis points to 5.196%, while the 10-year dropped to 4.647%. Lower long-term interest rates make speculative assets like Ether comparatively more attractive because the "safe" alternative — government bonds — pays less.

• A $40 Trillion Debt Backdrop Raises Doubts About Staying Power The buyback arrived on the same day U.S. national debt surpassed $40 trillion , after adding $1 trillion in just a few months.

Evercore ISI analysts questioned whether the move would have a lasting impact given that the Treasury still needs to finance a "tidal wave" of maturing debt and deficits. If yields resume climbing, ETHV's gains could evaporate just as quickly.

• Ether ETF Inflows Were Already Building Before the Surprise

Spot Ether ETFs recorded roughly $71.4 million in net inflows on August 18, marking four consecutive days of positive flows.

The prior week saw nearly $245 million flow into Ether ETF products, extending a five-week inflow streak. That institutional buying gave ETHV a firmer floor heading into the Treasury announcement.

• ETHV Remains Deep in the Red Despite the Pop

As of August 17, ETHV's year-to-date return was -35.77% with total net assets of just $92.66 million.

Ethereum peaked near $5,000 in August 2025 before early 2026 brought a sharp downturn driven by recession fears and large insider sales. Today's rally is dramatic but leaves the fund far below where most buyers entered. Investors need to decide whether Bessent's intervention marks a turning point — or just a tactical reprieve before fiscal gravity reasserts itself.