Investment case
iShares 20+ Year Treasury Bond ETF
TLT · 44 developments mapped · last assessed 2026-09-28
Market Ontology has mapped 44 macro, policy, and market developments to iShares 20+ Year Treasury Bond ETF since 2026-08-13. 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 TLT yet, so no modelled value is shown. The TLT valuation is in the public catch-up queue.
Subscribers do not wait for the weekly cycle: they run TLT on demand, against live prices and the latest filings, and change any assumption the developments below move.
Filed financials
Current case
- Strongest support
U.S. Treasury Doubles Long-Term Bond Buybacks to $4B Per Operation
Increased demand from the U.S. Treasury for long-term bonds directly drives up bond prices and lowers yields. As an ETF holding long-term Treasury bonds, TLT's net asset value (NAV) directly benefits from rising bond prices.
· Moves underlying asset prices
- Main threat
10Y Treasury yield reaches 5.23% following Fed 25bp rate hike and hawkish guidance
Direct inverse relationship between bond yields and bond prices. Higher yields mean lower bond prices.
· Moves bond price (inverse to yield)
- Open question
Annaly Slides 8.5% Over 30 Days as Agency Mortgage Spreads Challenge REITs
Indirectly affected by broader fixed income market sentiment and interest rate expectations. Widening MBS spreads can sometimes correlate with broader bond market volatility.
· Moves interest rate expectations, fixed income market volatility
What changed, by assumption
- 2026-09-2810Y Treasury yield reaches 5.23% following Fed 25bp rate hike and hawkish guidance
- 2026-09-2810-Year Treasury yield reaches 5.23% following 25bp Fed hike and hawkish guidance
- 2026-09-2810-Year Treasury Yield Hits 5.23% as Hawkish Fed Signals Higher-for-Longer Path
- 2026-08-2630-Year Treasury Yield Hits 5.23%, Surpassing Blue-Chip Dividends
- 2026-08-26Treasury Doubles Bond Buyback to $4B as 30-Year Yield Hits 5.23% Amid $40T Debt
- 2026-09-28Fed 25bp Rate Increase Reprices Floating-Rate Private Credit Yields
- 2026-09-2530-Year Treasury Yield Hits 2004 Highs as Equity Indices Extend Two-Day Pullback
- 2026-09-25Long-End Treasury Yields Reach 2004 Highs as Equity Indices Decline
- 2026-09-1610-Year Treasury Yield Surges to 5.041%, Highest Level Since July 2007
- 2026-09-22LGI Homes Launches National Rate-Buydown Campaign to Move Housing Inventory
- 2026-09-09Fed Rate Hike Odds Cross 60% Threshold Pressuring Risk Assets
- 2026-09-19Annaly Slides 8.5% Over 30 Days as Agency Mortgage Spreads Challenge REITs
- 2026-09-06Nvidia Q2 FY2027 revenue doubled to $96.2B; free cash flow $69.9B
- 2026-09-04Waller backs holding rates; Bitcoin jumps 5.5% to $81,491.82
Assumption changes
Full ledger →| Date | Assumption | Direction | Why | Conf. |
|---|---|---|---|---|
| 2026-08-21 | Cost of capital | Bearish | Treasury repurchases targeting long-dated securities effectively cap the term premium and lower discount rates. | 0.85 |
Event impact log
Full ledger →| Date | Mechanism | Direction | Horizon | Impact |
|---|---|---|---|---|
| 2026-09-28 | 10Y Treasury yield reaches 5.23% following Fed 25bp rate hike and hawkish guidance | Bearish | intraday | 0.90 |
| 2026-09-28 | 10-Year Treasury Yield Hits 5.23% as Hawkish Fed Signals Higher-for-Longer Path | Bearish | intraday | 0.90 |
| 2026-09-28 | Fed 25bp Rate Increase Reprices Floating-Rate Private Credit Yields | Bearish | intraday | 0.90 |
| 2026-09-28 | US National Debt Tops $40 Trillion as Annual Interest Expense Hits $1.25 Trillion | Bearish | 1-3m | 0.80 |
| 2026-09-28 | US National Debt Surpasses $40 Trillion as Annual Interest Expense Reaches $1.25 Trillion | Bearish | 1-3m | 0.80 |
| 2026-09-28 | 10-Year Treasury yield reaches 5.23% following 25bp Fed hike and hawkish guidance | Bearish | intraday | 0.90 |
| 2026-09-28 | US national debt crosses $40T as annual interest expense reaches $1.25T | Bearish | 1-3m | 0.80 |
| 2026-09-25 | 30-Year Treasury Yield Hits 2004 Highs as Equity Indices Extend Two-Day Pullback | Bearish | intraday | 0.90 |
| 2026-09-25 | Long-End Treasury Yields Reach 2004 Highs as Equity Indices Decline | Bearish | intraday | 0.90 |
| 2026-09-22 | LGI Homes Launches Rate Buy-Down Incentives Across Move-In Ready Inventory | watch | 1-5d | 0.20 |
| 2026-09-22 | Huntington Bancshares Trims Loan Growth Outlook to 6% and Upsizes 2027 Buyback | Bullish | 1-3m | 0.40 |
| 2026-09-22 | LGI Homes Launches National Rate-Buydown Campaign to Move Housing Inventory | mixed | 1-5d | 0.40 |