Investment case
Vanguard Long-Term Treasury Index Fund ETF Shares
VGLT · 2 developments mapped · last assessed 2026-08-24
Market Ontology has mapped 2 macro, policy, and market developments to Vanguard Long-Term Treasury Index Fund ETF Shares since 2026-08-23. Each one is traced from the driver to the valuation assumption it moves, and the valuation below is run on the same engine the subscription uses.
Valuation
No validated run has been published for VGLT yet, so no modelled value is shown. The VGLT valuation is in the public catch-up queue.
Subscribers do not wait for the weekly cycle: they run VGLT on demand, against live prices and the latest filings, and change any assumption the developments below move.
Filed financials
Current case
- Main threat
Treasury Yields Hit Multi-Year Highs; 10Y at 4.65%
VGLT holds long-term Treasury bonds, which are highly sensitive to changes in long-term interest rates due to their longer duration. The 'long-end yields are leading the move' implies a particularly strong negative impact on this ETF's current value.
· Moves underlying bond prices, duration sensitivity
- Open question
US Treasury Yields Reach Multi-Year Highs; 10Y at 4.65%
Direct impact on bond prices and yields, with higher sensitivity due to longer duration.
· Moves underlying bond portfolio value, yield to maturity of new bond purchases
What changed, by assumption
- 2026-08-24Treasury Yields Hit Multi-Year Highs; 10Y at 4.65%
- 2026-08-23US Treasury Yields Reach Multi-Year Highs; 10Y at 4.65%
Event impact log
Full ledger →| Date | Mechanism | Direction | Horizon | Impact |
|---|---|---|---|---|
| 2026-08-24 | Treasury Yields Hit Multi-Year Highs; 10Y at 4.65% | Bearish | intraday | 0.90 |
| 2026-08-23 | US Treasury Yields Reach Multi-Year Highs; 10Y at 4.65% | mixed | 1-3m | 0.80 |